Abstract: To create a praline package for pralines, in particular for truffle pralines, comprising a lower housing cup, which consists of a first housing plate comprising recesses, and comprising an upper housing cup, which consists of a second housing plate comprising projections, which protects the pralines mechanically and hygienically and which can be produced in a simple and cost-efficient manner, it is proposed that, when the praline package is closed, the first and the second housing plate adjoin flatly such that a recess of the lower housing cup in each case corresponds to a projection of the upper housing cup and thus forms a capsule for one praline in each case.

Abstract: A method of reducing fuel vapor permeation through a multi-layer tank includes providing a multi-layer overlay onto at least a portion of a structural layer of the multi-layer tank. The multi-layer overlay preferably comprises at least one structural layer composed of a polymeric material that is compatible with one or more of the polymeric structural layer(s) of the multi-layer tank. The multi-layer overlay further comprises at least one barrier layer composed of a vapor barrier material resistant to hydrocarbon permeation therethrough. The multi-layer overlay may be secured to the multi-layer tank by, for example, applying a suitable amount of heat and pressure thereto or by molding the multi-layer overlay to the tank body during a tank forming process.

Abstract: A surgical fluid basin includes a receptacle member having a lower wall and a peripheral wall extending from the lower wall and arranged about a longitudinal axis, and having an internal chamber within the peripheral wall for reception of fluids. The peripheral wall has at least one terrace defined within the peripheral wall corresponding to a volume of fluid contained within the internal chamber. The at least one terrace defines an internal rise surface and an internal run surface intersecting the internal rise surface. The internal run surface includes indicia markings corresponding to the volume of fluid contained within the internal chamber. A plurality of terraces may be defined within the peripheral wall with each terrace corresponding to a predetermined volume of fluid contained within the internal chamber. The internal run surface defined by each terrace includes indicia markings corresponding to the volume of fluid contained within the internal chamber.

Abstract: A product storage container that includes a container body, a slide mechanism, and a frangible tear strip. The container body includes a base portion that is joined to a cover portion through a hinge section. The cover portion provides an upper flange extension that defines a first slot, the base portion provides a lower flange extension that defines a second slot, and the hinge section allows the cover portion to move between an open position and a closed position. The slide mechanism is positioned within the first and second slots and is configured to secure the cover portion in the closed position when arranged in a first position. The frangible tear strip maintains the slide mechanism in the first position, and upon severing, allows the slide mechanism to travel to a second position which enables the cover to be moved to the open position.

Abstract: A crushing device (100) is suitable for crushing pills (703), tablets, or other ingestive objects. The crushing device (100) includes a base (101), an anvil (104), an end pillar (105), and a support pillar (106). A threaded shaft (108) is disposed between the anvil (104) and the end pillar (105), and passes through an aperture (107) in the support pillar (106). The threaded shaft (108) is coupled to a crushing head (109), which translates toward the anvil (104) when a lever (110) coupled to the threaded shaft (108) is rotated radially about an axis (301) of the threaded shaft (108). When a pill crushing pouch (500) having pills (703) therein is placed between the crushing head (109) and the anvil (104), rotation of the lever (110) crushes the pills (703).

Abstract: A positioning structure for a document box contains a first cover and a second cover, two grooves formed on a connection of the first and the second covers; the first cover including two first recesses, and the second cover including two second recesses, two retainers are attached in the first and the second recesses; the first cover also including a first slot, a second slot, and a third slot; the second cover also including a first notch, a second notch, and a third notch; wherein each positioning member includes an integrally formed abutting block, an actuating section fixed thereon, a first inserting piece extending downward from a rear side of the abutting block, two inserting pieces attached on two sides of the first inserting piece individually, and a cutout formed on the first inserting piece.

Abstract: A clam-shell container system can include first and second container pieces that are hingedly connected. The first container piece can include a perimeter and a hangable tab, the hangable tab having an opening configured to receive a rod. The hinge connection can be perforated, such that it breaks upon actuation of the hangable tab to open the container system. The second container piece can include a cutout in proximity to the hinge connection and the hangable tab. Accordingly, the cutout can provide clearance for the rotation of the hangable tab beyond the hinge connection. Further, the second container piece can have a perimeter having a shape substantially similar to the perimeter of the first container piece. The perimeters can form a substantial seal in combination.

Abstract: A pressurizable chamber device or containment vessel and method of use thereof. The device or vessel includes two chamber portions, a lid portion and a base portion, drawn to one another via a nut portion. The lid and base portions each include concave surfaces that matingly fit together, such that an internal chamber is formed when these portions are fit together. The lid and base portions each include a flange having a groove therein, such that a flexible seal element is fittable into the groove. The lid and base portions include features to matingly engage the nut portion, such that engagement thereamong draws the lid portion and the base portion toward one another, tightly sealing the formed internal chamber. A pressure, such as a resin pressure that may be precisely regulated, may then be applied, for example, to a mold contained within the formed and tightly sealed chamber.

Abstract: An animal-resistant container system includes a first container and a second container. A fastener has a first part attached to the first container and a second part attached to the second container. The fastener tightly attaches the first container to the second container so as to prevent animals from accessing contents of the first container and the second container.

Abstract: A storage device includes a box having a bottom wall, a top wall, a left sidewall, a right sidewall, and an internal wall that divides the box into a first compartment and a relatively larger, second compartment. A roll of tape is rotatably mounted inside the first compartment. First and second bottom drawers occupy a lower portion of the second compartment in side-by-side relationship to one another, and a top drawer rests on top of the bottom drawers. A display panel is rotatably mounted on the box for rotation between a first orientation, blocking access to the second compartment, and a second orientation, allowing access to the second compartment. At least one of a photograph and an erasable writing surface are disposed on the display panel and face forward when the display panel occupies the first orientation. Key-ring hooks are secured to a front edge of the bottom wall.

Abstract: An assembling device for attaching a light guide plate and a reflecting member together is provided. The assembling device includes a first receiving member and a second receiving member. The first receiving member defines a first recess therein for accommodating the light guide plate. The second receiving member defines a second recess therein for accommodating the reflecting member. The assembling device has an open position and a closed position. The light guide plate is capable of being loaded in the first recess and the reflecting member is capable of being loaded in the second recess when the assembling device is in the open position. The first receiving member and the second receiving member are aligned with and parallel to each other when the assembling device is in the closed position.

Abstract: A container for a flexible bag of liquid that supports the bag during transportation, storage and use in dispensing of the liquid. The container is made from two generally similar pans that form lower and upper parts of the container. Each pan includes a plurality of generally similar multiple projections that function to support the container on a surface as well as in a stable stacked formation.

Abstract: A container (10) with lower and upper parts of formed plastic sheeting, is constructed of two identical elements (12, 14) that can close and latch to each other to form a closed container by turning a second of the elements upside down to make it the upper element, and pressing it down against the lower first element. The lower element includes a base wall (20) which is the bottommost wall and which has a vertical axis (22), upstanding side walls (24), and a flange (30) extending radially away from the top of the side walls. Along a left half (34) of the lower element, the flange forms an upward projection(s) (42), and along the right half (36) of the lower element the flange forms an upwardly-opening groove (44). Each projection and groove extends in a zig-zag line along the flange.

Abstract: A container has a base with a bottom wall rib structure which deforms downwardly when an unresisted load is applied. The rib structure stiffens the base, and also can elevate the food product from liquid within the container. The bottom wall has a central platform which extends upwardly from a lower encircling segment. The lower encircling segment marks the lowermost portion of the base as molded, and extends inwardly from the lower margin of the sidewall. Two generally parallel longitudinal ribs extend across the platform and project upwardly from the platform. The longitudinal ribs extend from the lower encircling segment at the front of the base to the rear of the base. Short bridging ribs are evenly spaced parallel to one another and extend laterally between and connect the two longitudinal ribs. A plurality of cross ribs extend outwardly from each longitudinal rib to the encircling segment.

Abstract: A sign system comprises one or more box-like modules having a front section and a corresponding rear section sized to fit together in sliding engagement to define an interior cavity. The sections may be joined together with fasteners which engage the side panels of each section thereby leaving the front and rear surfaces free of discontinuities. The sign modules may be affixed to a generally planar surface or supported on internal or external mounting posts. During installation, the rear section may be mounted first and the front section subsequently attached to the rear section. In this way only approximately one-half of the total weight of the sign need be lifted and manipulated at any one time thereby facilitating installation. The interior cavity defined by the front and rear sections may accommodate lighting means for internally lighting the sign.

Abstract: There are provided a capsule and a chemical reaction cartridge capable of properly handling reagents and so forth. The capsule is formed by laminating two dome-shaped films together at the peripheries thereof. The films are formed by subjecting heat sealable films, to which aluminum vapor deposition is applied, to a drawing process. The films are made of a material (easy-peel material), which can be varied in seal strength by a heating temperature and are thermally welded together at an adhesion area at the peripheries thereof. Thereafter, contents such as reagents and so forth are filled up inside the capsule via a filling section.

Abstract: An insulated cover for toilet water closets intended to prevent condensation and its associated damaging properties is herein disclosed. The water closet section of the toilet is covered on the bottom and all four (4) side surfaces up to a water line with a preformed foam covering. The foam is envisioned to be of a closed cell design similar to that used on insulating sleeves for glasses and canned beverages. The foam is approximately one-quarter (¼) inch thick and available in a wide variety of colors to match all bathroom decors. The foam covering would be made in halves that meet in a shiplap joint on the sides of the water closet. Finally, the cover would be held in place on the water closet with multiple strips of hook and loop fastener material, thus allowing it to be easily removed for replacement or cleaning.

Abstract: The invention relates to a container (1) comprising a transparent cylindrical container wall (2) and an envelope (8) covering the entire container wall. Such containers are used in the form of a vial, an ampulla or a syringe, for example, in clinical tests of medicaments or remedies. According to the invention, the envelope is embodied in an opaque manner such that it can be determined whether undissolved particles are still present in the liquid, but the actual color of the content cannot be determined.

Abstract: A collapsible and/or erectable, shape-sustaining substantially egg-shaped container is selectively moveable from a substantially erect condition to a substantially collapsed condition and/or from a substantially erect condition to a substantially collapsed condition.

Abstract: A durable, reusable dual compartment sandwich container having upper and lower compartments that are pivotally connected to one another and separated by a rotatable divider. One or more slices of bread or an elongated sandwich roll is carried within the upper compartment and the ingredients for a sandwich are carried in the lower compartment. The divider is rotated over top of the lower compartment so as to segregate the wet ingredients from the dry bread and thereby prevent the bread from becoming soggy. A removable hot/cold pack is also carried within the lower compartment to provide heat or cold to the sandwich ingredients over a prolonged period of time in order to avoid the premature spoilage of the ingredients prior to consumption.

Abstract: The disclosure relates to a transport container for accommodating products during a high-pressure treatment of these products. By means of the transport container, the products can be transported into and out of a chamber in which they are high-pressure treated. The transport container comprises a lower component and an upper component which are adapted to be connected to one another, the lower component as well as the upper component being configured for accommodating at least one product.

Abstract: The present invention relates to a food container assembly comprising a base and a lid wherein the base and the lid are structurally identical in one of the embodiments. The base and the lid include inter-cooperating sealing areas in the form of ridges and mating grooves. The base and the lid can be joined via a first hinge/latch combination in a mutually hingeable relationship along a pair of corresponding sides, and in addition, can be mutually secured along an opposing pair of corresponding sides via a second hinge/latch combination. According to one embodiment of the invention, the container base includes a bottom wall; a sidewall; and a peripheral rim having a ridge portion, a groove portion, a hinge flap and a locking area; wherein the container base is adapted for engagement and latching with another identical container base disposed in an inverted and superjacent relationship therewith.

Abstract: A pressurizable chamber device or containment vessel and method of use thereof. The device or vessel includes two chamber portions, a lid portion and a base portion, drawn to one another via a nut portion. The lid and base portions each include concave surfaces that matingly fit together, such that an internal chamber is formed when these portions are fit together. The lid and base portions each include a flange having a groove therein, such that a flexible seal element is fittable into the groove. The lid and base portions include features to matingly engage the nut portion, such that engagement thereamong draws the lid portion and the base portion toward one another, tightly sealing the formed internal chamber. A pressure, such as a resin pressure that may be precisely regulated, may then be applied, for example, to a mold contained within the formed and tightly sealed chamber.

Abstract: A clamshell package is provided including an enclosure configured to hold a product. The enclosure includes a recess configured to receive an alarm component of an alarm spider wrap.

Abstract: A container for carry out heated food items, such as rotisserie chicken, has a base which is connected to a lid by a mating peripheral closure which defines a liquid tight seal. The closure has an encircling inclined wall on the base, which helps to direct the lid into engagement with the base, and which also defines a cavity within the closure which can retain liquid. The base may be provided with two fold up straps which are retained by structure in the lid to lie generally flat to serve as a convenient carrying handle above the lid. The base has rib structure allowing it to distend downwardly when loaded with food to space the heated food from the customer's hand while engaged with the handle.

Abstract: A generally circular container is disclosed. The container comprises a continuous body portion. The container further comprises a rim encompassing and projecting laterally outwardly from the body portion. The container further comprises a first feature projecting generally upwardly from the rim. The container further comprises a corresponding second feature positioned on the rim. The container further comprises a stacking feature formed on the body portion opposite the rim. The stacking feature extends substantially along the circumference of the container. The container is adapted to be stacked with a second container, the second container being inverted relative to the first container, by engaging the stacking feature of the container with a second stacking feature of the second container to prevent or inhibit lateral movement of the container relative to the second container.

Abstract: A container for liquids comprising a first portion forming an approximate half container portion; a second portion forming an approximate half container portion, the first and second portions having a generally convex exterior shape with flange portions along perimeters thereof; a liquid impermeable barrier film being disposed on a concave interior portion of each of the first and second portions and extending onto the flange portions; the first and second portions being sealed together at the flange portions to form a liquid impermeable container; and there being provided a location on the container for the disposition of a closure device to allow contents of the container, once filled, to be removed.

Abstract: This invention relates to novel compositions and methods of use by which the compositions of this invention are applied topically to one or more body parts of at least two individuals who bring said body parts into contact with the other individual and, when said body parts come into contact with each other, permit the formulations to interact and thereby achieve an unexpected sensation to each individual.

Abstract: An apparatus for cultivating a cucumber, eggplant or the like includes a fastening element for allowing an opened cover body to be fastened into a closed state or a closed cover body to be separated into an opened state by causing a catching protrusion opened along the longitudinal direction of the cover body, and a plurality of catching steps to allow the cover body to be coupled and fastened when catching steps are hooked on a catching protrusion, and a cover body distortion prevention projection formed protruding from the catching protrusion to fix opposite sides of each of the catching steps when each catching step is hooked on the catching protrusion. Cover body separation/opening supports are formed, respectively, on the top of each catching step and on the catching protrusion such that the fastened cover body can be unfastened and opened.

Abstract: An aircraft brake assembly container and a method for using an aircraft brake assembly in servicing an aircraft, with the container having at least two identical container portions, at least one of the at least two container portions having an at least one sliding channel therein, an at least one cradle member having an at least one sliding portion engaging with the at least one sliding channel, and at least one securement device securing the at least two identical container portions.

Abstract: A buckle serves to fix together a lower container part and an upper container part of a thin plate storage container. The buckle includes a plate-shaped main body, an upper hook having a groove engaged with a locking plate of the upper container part, a lower hook having a groove engaged with a locking plate of the lower container part, spring mounting recesses formed at center positions of the upper hook and the lower hook, leaf springs which are fitted in the spring mounting recesses, and locking protrusions at the middle of the leaf springs and fitted into notches formed in the locking plates of the lower container part and the upper container part to position and support the lower container part and the upper container part. The upper hook and the lower hook are vertically and horizontally symmetric.

Abstract: In a tank B for water treatment, consisting of at least two plastic material tank parts 1, 2 produced by injection moulding or by injection moulding and embossing a separately produced separation wall T is mounted with the edge at the walls of the tank parts such that the mounting regions at least partly are watertight. The separation wall T extends in the tank B crosswise to the joining plane E. The tank parts have opening edge structures R which fit on each other and which are joined in the joining plane E in watertight fashion.

Abstract: A multi-chambered beverage container configured to store a plurality of separate liquids and facilitate the simultaneous consumption thereof. There is a container having a divider configured to separate a first chamber and a second chamber. The container includes a lid having a first aperture and a second aperture therethrough. The container includes a first straw disposed through the first aperture, wherein a top portion of the first straw is substantially acircular including a first mating side; and a second straw disposed through the second aperture, wherein a top portion of the second straw is substantially acircular including a second mating side configured to mate to the first mating side. The first and second mating sides of the first and second straws comprise an adhesive material configured to couple the mating sides of the first and second straws together.

Abstract: The present application contemplates an adjustable volume storage container. The container is formed from two panels (10). The panels are made from a heavy duty paper board or corrugated cardboard, or the like, and are foldable. The panels (10) are prefabricated, each having a slot array (70) and two tabs (72, 74). The panels (10) are also cut to form sub-panels. The panels (10) are folded along lines (40) and (42) so that the tabs (72, 74) of one panel (10) can mate with the slot array (70) of the other panel (10). The particular slot selected determines the length of the container. Once the tabs (72, 74) are mated with the slot arrays (70), the bottom sub-panels (62, 64, 66) are folded under and fastened to form the container bottom. The container is filled, and then the upper sub-panels (50, 52, 54) are folded over and fastened creating the container top.

Abstract: The subject application is a container having a first body with a female union (joint), a second body with a male union (joint) and a lid, which, once assembled under manual pressure, packages the bodies within the same container for holding at least two beverages separate from one another for utilization thereof by a consumer.

Abstract: A reusable display package having a first body with a first pocket and a second body with a second pocket is provided. A hinge connects the first body to the second body to move the first body relative to the second body from an open display position to a closed carrying position. At the open display position, the first body and the second body are coplanar and the packaging is capable of displaying products. At the closed carrying position, the first body is substantially parallel to the second body. Retaining members lock the hinge at the open display position and are removable for moving the bodies to the closed carrying position.

Abstract: A broad head cover device for encasing a broad head to protect the broad head during storage and transport includes a pair of clamshell portions being positionable around the broad head to enclose the broad head between the clamshell portions. The clamshell portions inhibit contact with the broad head when the clamshell portions are positioned around the broad head. One of the clamshell portions is hingedly coupled to the other one of the clamshell portions to permit pivoting of the clamshell portions between a closed position and an open position. A latching assembly includes a first mating portion and a second mating portion. The first mating portion is coupled to one of the clamshell portions and the second mating portion is coupled to the other one of the clamshell portions. The first mating portion mates with the second mating portion to releasably secure the clamshell portions in the closed position.

Abstract: A cooler having two compartments connected together along a common edge. The cooler is configurable between an open configuration and a closed configuration by rotating the compartments about the edge. The cooler may include a handle connected to each compartment near the edge, and the two compartments may be secured to one another by a zipper or other fastener. A cooler is also provided having a bag with a zipper with sets of teeth extending along portions of the top edge of the bag. The cooler may be closed by closing the zipper and folding the bag in a manner so as to create flaps that can be folded downwards and secured to the bag.

Abstract: An airtight food container includes a main body and a top cover that correspond to each other in their form and dimensions and, therefore, may be produced by the same mold in an injection molding process. A flange portion is formed at the rim of the main body. One half part of the flange portion is provided with a protrusion while the other half part thereof is recessed. Furthermore, an ear portion having an enlarged surface is formed at the protrusion portion and the recessed portion. Accordingly, one of two completely identical main bodies (the top one) is turned upside down (at 180°) such that the opening is directed downward and a top cover is formed. Besides, the recessed portion and the protrusion portion of the flange portion of the top cover just correspond to the protrusion portion and the recessed portion, respectively, such that the top cover and the main body fit into each other to form an airtight container.

Abstract: A temperature-retaining food container includes an outer shell having an inner chamber that can be filled with a temperature storing medium. The shell is shaped to provide an expansion zone within the chamber to permit expansion of the medium. A support is formed to provide additional volume to the chamber and the expansion zone. The support structure can optionally be provided to automatically expand in response to an increase in pressure within the chamber. A lid is provided which covers the container and further operates as a serving platter. The shell of the container can optionally be formed from a plurality of separate portions, which interlock to form the complete serving container and disassemble for storage or use with smaller or crowded appliances.

Abstract: A beverage container has a body with a hollow interior. A spout is positioned at one end of the body and is configured to selectively dispense liquid from the interior of the body. The body also has a closed end opposite the one end. A seam is formed on the body between a first body section and a second body section and the two body sections are separable from one another along the seam. A liquid-tight seal is formed along the seam. Each body section is configured to define a part of the hollow interior of the body and to directly contact a liquid held in the hollow interior. A mechanism on the container can be manipulated to secure the body sections together sufficient to maintain the liquid-tight seal along the seam and to permit separation of the two body sections exposing their respective interior surfaces.

Abstract: A container for recording media, such as disk(s) includes first and second essentially identical trays. Each tray is adapted to releasably receive a disk for protective storage. The trays are oriented in overlying and registered relationship to one another and affixed to one surface of a sheet, such as paperboard, in side-by-side relationship. The trays are spaced apart from one another on the sheet to define a spline area of the sheet between the adjacent sides of the trays. Each tray includes unique respective male and female latch means for releasably securing the trays in a closed attitude.

Abstract: A single point hinge and a method of thermoforming a plastic container including a single point hinge include a lid, a tray, a single point hinge connecting the lid and the tray. The single point hinge includes an angle formed by a lid chamfer and a tray chamfer. The single point hinge further includes a lid well adjacent to the lid chamfer and a tray well adjacent to the tray chamfer, and the lid connects to the lid well and the tray connects to the tray well.

Abstract: An improved underground box and lid for use in irrigation systems and other underground systems is provided. A single box can be inverted, combined and interlocked with a second box to form a single enclosed structure that is twice as high. This can be used for those installations where underground system components are buried in the ground at a greater depth than can be accommodated by a single box.

Abstract: A rope can system which incorporates storage for lariat, piggin string, gloves, and an integral seating arrangement is disclosed. The disclosed invention is particularly well suited for use in competition rodeo scenarios wherein a cowboy or cowgirl has need for storage of competition materials used in calf roping. The present system permits uniform storage of lariat ropes and the like, as well as the piggin string used for securing the calf. Other accessories such as gloves may also be stored in the water-tight compartments of the disclosed invention. A key feature of the disclosed invention is the incorporation of a seating arrangement to permit the rope can to be used as a resting apparatus while the cowboy/cowgirl waits for their opportunity to compete.

Abstract: An end user container for food in refrigerated storage and subsequent microwave cooking is made of a thermo-plastic material transparent to radiant energy. The lid and tray are thermo-formed pieces and incorporate latches as integral features in the respective parts. They are arranged with a post-in-socket capability for latching the lid to the tray in a position which will permit venting of the interior of the container assembly to the exterior. The rims of the tray and lid are formed to enable pressing them together providing a surface sealing between the tray and lid along engaging wall portions of the lid and tray continuously around the container. Also, the lid has a bottom cooperating with the wall to provide a well, and the wall of the tray is outwardly turned, providing a step or ledge near the top of the tray and extending out to the upper wall portion, forming a part of the rim and which engages the well wall when the container is closed to the seal condition.

Abstract: A plate container with detachable cover is disclosed. The container includes a base in the form of a plate and a cover. The plate and the cover include first and second closure portions, respectively, which are engageable with each other to maintain the cover in a secure position relative to the base and also forms a substantially leak-proof seal. The cover can include gripping tabs for facilitating the separation of the cover from the base and permit container venting. The plastic container is suited for microwave cooking, machine dishwashing, and freezer use.

Abstract: A plate container with detachable cover is disclosed. The container includes a base in the form of a plate and a cover. The plate and the cover include first and second closure portions, respectively, which are engageable with each other to maintain the cover in a secure position relative to the base and also forms a substantially leak-proof seal. The cover can include gripping tabs for facilitating the separation of the cover from the base and permit container venting. The plastic container is suited for microwave cooking, machine dishwashing, and freezer use.

Abstract: There is provided a container having both male and female sealing regions disposed about its periphery in a pattern making it possible to seal a container with another container having substantially identical sealing regions. The male sealing regions used in the practice of the present invention may take the form of a U-shaped ridge which is undercut along at least one leg of the U in a radial direction. Typically, a container will be thermoformed from lightweight thermoplastic material giving the U-shaped ridge considerable flexibility. The female sealing regions used in the practice of the invention may take the form of an undercut channel adapted to receive and match the undercut U-shaped ridges found in the male portion of the container wherein the walls and base of the channel are sufficiently flexible that the undercut portions of the U-shaped ridge are urged into engagement with the undercut portions of the channel.

Abstract: There is provided a container having both male and female sealing regions disposed about its periphery in a pattern making it possible to seal a container with another container having substantially identical sealing regions. The male sealing regions used in the practice of the present invention may take the form of a U-shaped ridge which is undercut along at least one leg of the U. Typically, a container will he thermoformed from lightweight thermoplastic material giving the U-shaped ridge considerable flexibility. The female sealing regions used in the practice of the invention may take the form of an undercut channel adapted to receive and match the undercut U-shaped ridges found in the male portion of the container wherein the walls and base of the channel are sufficiently flexible that the undercut portions of the U-shaped ridge are urged into engagement with the undercut portions of the channel and the crest of the ridge is urged into the channel.