Abstract: A plastics material bottle is collapsible by applying axial compression, the bottle comprising a cylindrical body having a polygonal cross-section, e.g. a section that is substantially square or rectangular with rounded corners (18), the body being formed with transverse fluting grooves (14) which include fold starters (16) situated in the immediate vicinity of the above-mentioned rounded corners (18). The invention is particularly applicable to bottles for containing beverages such as mineral water, for example.

Abstract: The present invention relates to a new and improved collapsible container for use in transporting and dispensing fluids, primarily gasoline. In its broadest context, the present invention includes a flexible liner with at least three sides. Furthermore, metallic reinforcing walls are secured to at least two of these walls. Due to the material characteristics of the reinforcing walls, specifically a memory steel, a spring force is created which tends to urge the reinforcing walls inwardly. However, the presence of a fluid within the container overcomes this spring force and keeps the container in its non-collapsed or opened configuration.

Abstract: An expandable pan and method for collecting oil from a boat's engine in an environmentally and ecologically safe manner. The pan comprises a bottom, a back wall, a front wall and collapsible sidewalls, all extending upwardly from the bottom such that a well for collecting oil is created within. The sidewalls are expandable such that the front wall is movable away from the back wall such that the oil can flow into the well.

Abstract: A reusable, collapsible urine container includes a bottom wall and a relatively flexible, peripheral side wall extending upwardly from the bottom wall. The peripheral side wall includes upper, intermediate and lower concentric portions and an uppermost inclined or non-concentric portion extending upwardly and angularly from the upper concentric portion. The intermediate concentric portion has a wall thickness less than the upper and lower concentric portions, such that the peripheral side wall movable between axially extended and collapsed positions, wherein, in the collapsed position, the lower concentric side wall portion is partially telescoped within the upper concentric side wall portion with the intermediate concentric portion reverse folded therebetween. The uppermost or non-concentric portion is formed with an annular rim defining an upper open end of the container, the rim adapted to receive a removable cap. A handle is integrally formed in the peripheral side wall.

Abstract: A collapsible container for facilitating the transportation and handling of heat meltable materials, such as, e.g., caprolactam, hexamethylene diamine (HMDA), dodecanedioic acid (DDDA), or any monomer and salt combinations used in the production and polymerization of polyamides. An expandable/collapsible container or bag is employed for holding and dispensing the bulk material. The bulk material is transported in a solid form, and converted to liquid form for removal from the container. The container includes heat tubing circulating a heat carrying medium or a heating element for heating and converting the bulk material to liquid form. The liquified material is then pumped from the container into a suitable storage facility.

Abstract: The invention concerns a compost container consisting of a number of ring-shaped container sections, constructed to be assembled, as well as of a ventilated base-plate and a lid. The purpose of the invention, to improve the air supply to the container's internal composting space, is achieved by a ventilation partition, a part of the base-plate, which together with the inside wall of the bottom-most container section and ventilation column to facilitate air supply to said internal composting space. The purpose of the invention is further achieved by ventilation openings and in the uppermost container section and the lid, respectively, which allow air to leave the container's internal composting space in a manner that can be adjusted by turning the lid.

Abstract: A semi-rigid container, has a semi-rigid folding portion consisting of the plurality of diamond shaped panels forming a frustoconical shape. The panels are arced relative to the interconnecting frustoconical substrate in the transverse and longitudinal directions so that while the panels provide rigidity against a longitudinal collapsing force, they are able to expand transversely to enable folding of the folding portion under the longitudinal collapsing force and to resist expansion from the collapsed state. Other shapes of the panels are also described.

Abstract: A container adapted to store a beverage and, when empty, to function as a playball. The container includes a spherical shell formed of a flexible synthetic plastic material having a tubular neck projecting therefrom on which is received a screw-on cap. The neck is retractable into the shell whereby the neck then assumes a re-entrant form and the cap is then frictionally held therein flush with the shell. In a storage mode of the container, the shell is filled with a beverage and is sealed by the flush cap. To switch to an active mode, the shell is squeezed and the resultant internal pressure produced by the beverage causes the cap to pop out and project the neck so that the cap can be unscrewed to dispense the beverage. In the play mode, the shell is empty and the air therein is sealed by the cap which is depressed to be again flush with the shell, the container now being a pneumatic play ball.

Abstract: An axially crushable bottle made of plastics material and formed with transverse corrugations over the major portion of its height has fold starters in each corrugation, which fold starters project outwards from the bottoms of the corrugations and are angularly offset from one corrugation to another.

Abstract: A collapsible container comprising a peripheral side wall; a closed bottom at a lower end of the peripheral side wall and an opening at an upper end of the peripheral side wall; the peripheral side wall having at least three axial sections, with at least one relatively thin section located axially between upper and lower relatively thick sections; wherein at a transition area between the relatively thin section and at least one of the upper and lower relatively thick sections, the peripheral side wall is shaped to include a sideways oriented, substantially S-shaped cross section.

Abstract: An engine assembly 10 includes an inner housing 12 containing an engine in an outer housing 14 disposed about the inner housing 12 and defining a sealed chamber 16 therebetween. A fuel storage bladder 20 disposed within the chamber 16 in fluid communication with the engine through the inner housing 12. The bladder 20 includes a first wall 24 and a second wall 26 and a peripheral seam for perfecting a peripheral fuel-tight seam interconnecting the first and second walls 24, 26. The walls 24, 26 are flexible for bowing away from each other to contain fuel therebetween and lie against each other upon the application of fluid pressure from a pressure source 18. Each of the walls 24, 26 have an inner surface 28, 30 facing the inner surface of the other of the walls, the inner surfaces 28, 30 having an equal surface area whereby the inner surfaces 28, 30 completely engage each other when the bladder 20 is emptied of fuel.

Abstract: A system comprising a bottle with a variable volume the outer side wall of which is deformable in the direction of the height and a device integrated into the inside of the bottle and retained in the latter to hold the bottle in one of a series of states of volume and to allow its gradual deformation from one state of given volume to another state of smaller volume, the system being applicable in particular to fizzy beverages.

Abstract: The panel wall pool includes a sidewall with spaced apart panels supported in an upright position when the pool is empty by an inflatable ring, which also provides the protection of a cushion along the top of the sidewall area. The sidewall also includes a reinforcing band which encircles the panels to bind the panels together to substantially prevent individual panels from being forced outward and to help to prevent the outward bending or bowing of the sidewall of the pool.

Abstract: A portable food container for use in holding dry and liquid foods for consumption. The container allows an individual to consume a combination of dry cereal and cold milk in a remote location away from the kitchen without the use of a bowl and a spoon. The portable food container is inverted to allow dry cereal to flow therefrom, and squeezed to allow milk to flow therefrom.

Abstract: A pleated plastic container which is foldable and stored in a minimum space. The container comprises a foldable container body having a bottom protrusion, a mouth for being closed by a plug and for being fittingly engaged with said bottom protrusion, an outwardly directed concave recess formed at a neck portion of said mouth, and a lateral protrusion formed on the periphery of said bottom protrusion for fittingly engaging with said concave recess.

Abstract: A blank cut and scored for forming an electromagnetic interference shield is disclosed. The blank includes a rectangular bottom section and has first, second, third and fourth rectangular wall sections, wherein each wall section is joined to a separate side of the rectangular bottom section. Each of the first, second, third and fourth corner sections is formed by coaxial lines extending from the sides of the first, second, third and fourth rectangular wall sections and abut a corner of the rectangular bottom section. A perimeter area is contiguous with the first, second, third and fourth wall sections and first, second, third and fourth corner sections. In each corner section, a line diagonally bisects the corner section from the corner of the rectangular bottom section. First, second, third and fourth corner lines diagonally bisect each respective corner section from the corner of the rectangular bottom section through the abutting corner section into the perimeter area.

Abstract: A reusable collapsible container includes a bottom wall and a relatively flexible, peripheral side wall extending upwardly from the bottom wall, the side wall movable between axially extended and collapsed positions. The side wall includes lower and upper relatively thicker portions and an intermediate relatively thinner portion, and the upper portion joins with an annular rim adapted to receive a removable cap. The intermediate side wall portion is tapered radially inwardly and downwardly, and the lower side wall portion is tapered radially outwardly and downwardly substantially to the bottom wall, such that in a collapsed position, the lower side wall portion is partially telescoped within the upper side wall portion, with the intermediate portion reverse folded therebetween.

Abstract: A container is formed for a liquid. In order to reduce a volume of the container for a liquid after use thereof, a bellows portion is provided at an axial direction portion of a container main body. A lid member is removed, and liquid within the container for a liquid is discharged from an opening portion. The bellows portion is contracted so that head space can be adjusted and so that a volume of the container main body can be reduced. Further, because the head space can be adjusted, an interior of the container for a liquid is always substantially filled with the liquid so that oxidation of the liquid can be prevented. When the liquid is poured, the bellows portion automatically expands and contracts so that the liquid flows quickly and so that little air is drawn in. Further, if a certain amount or more of the liquid in the interior is discharged, the volume can be reduced, and a volume-reduced state can be maintained by tightly screwing the lid member.

Abstract: A bottle (10, 110) is made of flexible material which can be folded or rolled up into a deformed configuration of limited dimensions. The bottle comprises, between the pouring neck (14, 114) and side walls (15, 115), elements which engage with a fastening element (17, 117) which can be fitted onto the bottle to keep it in the deformed configuration.

Abstract: A container and associated cap assembly includes a container body having an open upper end defined by an annular rim, the rim having a substantially horizontal uppermost edge surface and a radially outwardly and downwardly extending bevelled surface. The cap has a top wall, a radially outer depending skirt portion and a radially inner depending skirt portion. The skirt portions are connected radially by an internal cap surface which includes a first substantially horizontal surface portion extending radially away from the radially inner skirt; a second downwardly and outwardly inclined sealing surface portion, and a third radiused surface portion connected to the radially outer skirt. The second downwardly and outwardly inclined sealing surface is sealingly engageable with the bevelled surface of the annular rim such that the substantially horizontal uppermost edge surface is axially spaced from the cap top wall upon full threaded engagement between said cap and said container body.

Abstract: The present invention relates to a bottle made of synthetic resin, for containing various liquids, that can be easily fractured for easier handling during disposal or recycling. The bottle comprises a plurality of fracturing walls, each formed in a longitudinal band shape extending substantially in a direction of a central axis of the bottle, and main walls each disposed between the fracturing walls. The fracturing walls are made of a first material and a second material, the first material being a synthetic resin that is the same as a synthetic resin forming the main walls and/or has good compatibility with the synthetic resin of the main walls, the second material being a synthetic resin that has poor compatibility with the synthetic resin of the main walls. The bonding strength between the fracturing walls and the main walls is controlled so as to make the bottle easily fractured. If necessary, an inner covering member can be assembled within the bottle.

Abstract: A collapsible container with four side faces, a top portion, a bottom and multiple score lines defined in each of the four side faces so that a one-quarter rotation of the top portion of the container while the bottom is held stationary causes the side faces to collapse and fold inward upon themselves along score lines on each side face.

Abstract: A reusable and collapsible container having a collapsed configuration for storage and shipment and an assembled configuration for containing a product. The container is formed from a polymeric sheet and has substantially flat panels, hinges connecting adjacent panels, and releasable fasteners on at least some of the panels for holding the panels in an assembled configuration. The sheet has opposing walls separated by longitudinally extending webs. A portion of the hinges cross the longitudinally extending webs and are formed by hot compression of at least one wall of the sheet. Another portion of the hinges are longitudinally extending and are formed by cold compression of at least one wall of the sheet.

Abstract: A gun boot comprising a hollow base having an open upper end and an open lower end; a mounting bracket secured to the base and removably securable to a tree stand; an upper lid removably coupled to the upper end of the base; a lower lid removably coupled to the lower end of the base; and a generally cone-shaped hollow flexible holster portion having a larger open upper extent and a smaller sealed lower extent with the upper extent secured to the lower end of the base, the holster portion positionable in an extended orientation with the lower extent projected from the lower end of the base and further positionable in a retracted orientation within the base.

Abstract: A compost chamber includes a substantially cylindrical casing extending from a first cap closing an inlet end thereof to a second cap closing an outlet end thereof, the caps having a door therein for receiving and removing compost materials therethrough, respectively. The casing is pleated in a continuous spiral about a longitudinal axis thereof substantially from the inlet end to the outlet end. Thus, the casing is collapsible and expandible by folding and unfolding, respectively, of at least one of the pleats. Furthermore, when the casing is rotated about its longitudinal axis, the compost materials contained therein are transferred from the inlet end toward the outlet end.

Abstract: A modular insulated intermodal freight container or other vehicle body constructed primarily of lightweight non-metallic composite material. The container includes a frame constructed substantially of pultruded composite frame components, and modular panels including pultruded composite panel members that are adhesively bonded together to form top, bottom and side walls. The walls are adhesively bonded to the frame to provide a substantially fastenerless container construction having light weight and good thermal and structural properties.

Abstract: To store an emergency container in the hub cavity of a spare tire within the trunk compartment of an automobile with a spare tire, the container is collapsible, having a top end and a bottom end with handles on each of said top end and bottom end to permit the container to be expanded. An opening extends along the axis of the container to receive a spindle for holding the collapsed container in the center of the spare tire until needed. The walls of said container containing foldable members to permit collapsing and opening of the container.

Abstract: A produce box structure comprising box side walls, bottom wall, and top wall sections, and two end walls, said end walls being substantially rigid for supporting the side walls and bottom wall; the end walls having peripheral edge portions, the bottom wall and side walls overlapping certain of the peripheral edges of the end walls and adhesively joined thereto; all of the walls consisting of lightweight plastic material, the bottom wall, side walls and top wall sections defined by thin inner and outer sheets and webs interconnecting the sheets, the webs extending directionally lengthwise toward the end walls, whereby lengthwise extending elongated cells are formed by the inner and outer sheets and webs; the side walls being integral with the top wall sections, whereby the top wall sections are hingedly connected to the side wall, respectively, and may be opened away from the end walls; and projections on the end walls, to which the top wall sections are releasably connectible.

Abstract: A reusable collapsible container includes a bottom wall and a relatively flexible, peripheral side wall extending upwardly from the bottom wall, the side wall movable between axially extended and collapsed positions. The side wall includes lower and upper relatively thicker portions and an intermediate relatively thinner portion, and the upper portion joins with an annular rim adapted to receive a removable cap. The intermediate side wall portion is tapered radially inwardly and downwardly, and the lower side wall portion is tapered radially outwardly and downwardly substantially to the bottom wall, such that in a collapsed position, the lower side wall portion is partially telescoped within the upper side wall portion, with the intermediate portion reverse folded therebetween.

Abstract: A container for containing a semi-solid product to be dispensed from the container by deformation in the axial direction, the container including a flexible part, a body part, and a cap part, each part having an open end, the cap part being securable to the body part to form a cylindrical container assembly, the side walls of the body part and of the cap part being deformable in the longitudinal direction to reduce the internal volume of the assembly and the assembly having a substantially constant external dimension over the side walls of the body part and the cap part, the body part having threads least towards its open end in its side wall and the cap part having threads towards its open end and in its side wall where the cap part and the body part may be secured to one another by interengagement of the threads, one of the parts having an outlet opening through which the contents of the assembly may be discharged upon deformation of the container assembly.

Abstract: A container closed at one end by a supporting surface includes a vertical tubular inner member and an outer envelope secured to the outside of the inner member. The outer envelope comprises at least four vertical partial tubular outer members equal in vertical length to and parallel to the inner member, the partial tubular outer members having an open arc-shaped cross-section with free ends at either side of the arc, each outer member being secured along both of its free ends to the outside of the inner member. The radius and location of each of the outer members relative to that of the inner member are such that, viewing the container in cross-section, four lines may be drawn, each line drawn through at least two tangent points on the outer members with at least two of the lines being parallel and intersecting tangent points on the inner member, the four lines intersecting to form a rectangle, which rectangle encloses the entire outside perimeter of the container.

Abstract: A reusable collapsible container includes a bottom wall and a relatively flexible, peripheral side wall extending upwardly from the bottom wall, the side wall movable between axially extended and collapsed positions. The side wall includes lower and upper relatively thicker portions and an intermediate relatively thinner portion, and the upper portion joins with an annular rim adapted to receive a removable cap. The intermediate side wall portion is tapered radially inwardly and downwardly, and the lower side wall portion is tapered radially outwardly and downwardly substantially to the bottom wall, such that in a collapsed position, the lower side wall portion is partially telescoped within the upper side wall portion, with the intermediate portion reverse folded therebetween.

Abstract: A collapsible, thin wall, plastic container includes a closed end, an annular peripheral side wall and an open end, the peripheral side wall including a plurality of annular steps or shoulders for enabling controlled axial collapse of the container to a compact, collapsed condition wherein a plurality of substantially concentric folds surround a remaining uncollapsed portion of the container; and a removable cap securable to the open end, the cap having a sealed chamber formed therein for holding a predetermined amount of foodstuff material.

Abstract: A disposable, compactable package for reliably dispensing a stack of sheet products even after the package has been deformed or compacted. The package comprises a top wall and a bottom wall comprised of a resiliently deformable material. The top and bottom walls are spaced from and oriented generally parallel to one another. They are connected to one another about their peripheries by means of a thinner more easily deformable substantially continuous tube or hoop which is also comprised of resiliently deformable material. The substantially continuous tube or hoop, which is preferably integrally formed with either the top wall, defines the side walls of the package.

Abstract: A multipurpose panel structure formed of a relatively thin resilient type material adaptable for use both as a container device and as a display sign, the panel structure comprising a relatively flat one-piece wall member having a cooperatively engageable interlocking arrangement associated therewith enabling the wall member to be formed into an open-ended closed wall structure capable of standing on end to form a container device, the cooperatively engageable interlocking arrangement being releasably detachable so as to enable the wall member to return to its normally flat condition for use as a display sign. The present wall member can be formed into a cylindrical shape, or it can be scored or otherwise weakened at various locations on its surface so as to form a multi-sided container structure. Any plurality of the present wall members may be connected together to form a multitude of container sizes and shapes.

Abstract: A collapsible container is disclosed having a top portion and a base portion joined by a generally cylindrical side wall structure, the generally cylindrical side wall structure has a central axis and a collapsible helical portion and the collapsible helical portion has a generally uniform radius and a generally flat side cross sectional shape with respect to the central axis. A cup section is also disclosed which can cause deformation of the collapsible container's side wall. The container is particularly suitable to store carbonated beverages and other consumer products.

Abstract: A stackable and collapsible container (10) includes a wall assembly (12) which includes a plurality of opposing panels (20, 21), and hinge means connecting each panel (20, 21) to at least two adjacent panels (20, 21).

Abstract: A sealed collection container having a hollow container body formed of semi-rigid material, such as plastic. The container body is provided with a sealable opening, and a non-venting spout which permits liquid to be poured from the container when inverted. The spout, in combination with deformable sides of the container form a system for metering a desired quantity of liquid from the container when inverted. The deformable sides can be formed thinner in thickness than the corner portions of the container from which the sides extend to aid the metering function of the container.

Abstract: The present invention relates to a collapsible hamper, used for the storage of laundry or other items comprising a rigid upper frame, a rigid lower frame, a lid movably hinged to the upper frame, a flexible side wall woven out of polypropylene strips, fabric or other weavable material, and a plurality of supporting rods removably secured between the upper and lower rigid frames, which define a three dimensional internal storage space and decorative external structure that is attractive to the eye when said hamper is assembled for use and which can be easily disassembled and collapsed for convenient storage or transport when not in use.

Abstract: A stackable collapsible container has a sidewall comprised of opposing conical sections. The upper conical section has a greater length and slighter angle than the lower conical section. Upon application of vertical force the lower section folds under the upper section, so the container assumes a stable collapsed state; and likewise, the necked conical top collapses to further reduce the overall length. The top of a collapsed container has a groove, so that when the top is mated to a ringed recess in a like second container, the containers resiliently lock to each other and thus may be readily stacked.

Abstract: A disposable collapsible beverage bottle is disclosed which includes a plurality of flexible straps extending along the bottle's exterior from a collar surrounding the neck of the bottle to a ratcheting arrangement at the bottom of the bottle. When the ratcheting arrangement is actuated, the straps are shortened causing the bottle to collapse. In this way, the volume of air in the bottle is controlled.

Abstract: A squeezable container with a paneled side wall which resists permanent deformation or denting when squeezed, and which preferably can be hot-filled. The container can be made substantially thinner than known hot-fill containers and includes a stepped vacuum panel profile for greater flexibility and resilience (bounce back). A circumferential ring is provided in the side wall to prevent ovalizing. The post walls (surrounding the vacuum panels) are stiffened to prevent vacuum collapse, by providing a substantially perpendicular junction between the vacuum panel and post wall, sufficient post wall depth, and/or reinforcing ribs in the post walls.

Abstract: A container made of a substantially dielectric material adapted to contain and preserve a perishable substance, comprising:a substantially elongated tubular portion defining an enclosure adapted to contain a perishable substance, the tubular portion being made from a flexible dielectric material, and defining an opening adapted to release said perishable substance through the opening by squeezing the tubular portion;a first magnet coupled to an interior wall of the tubular portion and extending substantially the length of the tubular position;a second magnet coupled to said interior wall of the tubular portion of a substantially opposite side of the tubular portion relative to the first magnet and facing the first magnetic defining a magnetic field between the first and second magnets; said magnetic field adapted to substantially encompass said perishable substance; anda porous material located between the first and second magnets to prevent contact between the first and second magnets.

Abstract: A reservoir is arranged to permit directing of various fluids into an ice maker such as spring water and the like, wherein the reservoir includes a valve arranged to permit selective fluid flow into the ice maker or selectively into a further conduit for discharge of fluid from said reservoir.

Abstract: The container comprises a relatively stiff, form-retaining supporting frame and a flexible shell member. The supporting frame comprises a polygonal bottom member and a corresponding cover member. Each angular point of the bottom member is connected with an angular point of the cover member by means of a rod-shaped element. The flexible shell member is connected with each rod-shaped element by means of a flexible loop member. Each loop member starts from a point of attachment to the shell member and passes around a rod-shaped element to a second point of attachment. The arrangement is such that the loop members keep the shell member within the outer boundaries of the supporting frame at all times, at least if the shell member contains goods to be packaged. According to the invention, a strip-shaped member made from a flexible material is connected with the shell member at the points of attachment.

Abstract: A portable cooler chest is disclosed having a collapsible storage bin for nonperishable items and wheels specially adapted for rolling on sand or soft soils. The collapsible storage bin includes foldable side panels and may be integrated with or separable from the lid of the chest. A cover is provided to cover the erected storage bin, or to enclose the collapsed storage bin between the cover and the lid. Pivotable rolling surface segments are hinged to the wheels such that the segments may be pivoted outwardly to augment the width of the rolling surfaces. The wheels are rotatably connected to the lower extent of the enclosure by pivoting spindles. The wheels may be pivoted under the bottom of the enclosure to prevent rolling of the chest and to place the wheels out of the way. Stowable retainer disks maintain the segments in the outwardly pivoted position. The wheels may be removed from the chest.

Abstract: A container for bulk materials, fluids and the like, comprising an enveloping member and an inner member which is connected to the enveloping member at at least four positions spaced along the circumference of the enveloping member, the arrangement being such that in filled condition a substantially block-shaped unit with substantially flat walls is obtained, the container further comprising a U-shaped stiffening member which comprises a web and two legs connecting thereto and is made of a material with a stiffness of its own, arranged so that the legs abut two opposite walls of the block-shaped unit and the web abuts the bottom wall of the block-shaped unit, the legs, at least in the areas adjacent their free upper edge, having a width corresponding substantially to that of the adjacent wall of the block-shaped unit and the U-shaped stiffening member being connected to the enveloping member at least in the areas referred to.

Abstract: A cup is provided with a flexible lip containing a duct having an end provided with a flexible valve which is opened by pinching the lip; the duct communicates with a receptacle containing the beverage and the wall of the receptacle is made from a flexible material so as to expand when a liquid is injected into the receptacle and to exert on the liquid a pressure tending to expel the liquid from the receptacle; a cover is provided for storing the cup and includes a filling and washing area.

Abstract: A collapsible container having at least one helical preferential fold region that enables a user to gradually and fixedly increase or decrease the internal volume of the container. A cup section is used to act on the collapsible container to cause folding or unfolding of the collapsible container's side wall.

Abstract: A food product container comprising upstanding front and back walls, a pair of upstanding side walls, a generally horizontal bottom and an upper mouth portion having a shoulder area sloping downwardly therefrom, wherein the front and back walls have recesses therein which are configured to cooperate with one another to facilitate manual gripping of the container by the hand of the user spanning one side wall of the container, with the user's thumb and one or more fingers opposed thereto engaging opposite recess surfaces. Each of the recesses preferably comprises a recessed panel having an outwardly convex, generally rectangular central portion and a rim angled outwardly from the central portion. A ridge having a relatively small radius of curvature is defined about the outer periphery of the rim. At each upper corner, the ridge has an arcuate configuration and curves slightly outward relative to the depth of the container.