Abstract: A lid for closing a wide mouth bottle has a sealing disc with a depending peripheral skirt. The skirt has an internal helical thread which takes the cross-sectional form of an elongated trapezoid tilted toward the sealing disc. The thread is formed of a flexible material for being deflected away from the disc and wedged against the neck of the bottle by the threads on the neck as the lid is tightened on the bottle.

Abstract: A fluid-flow-regulating contact applicator consisting of a plug or sleeve secured as a closure for a liquid dispensing bottle or similar container. The applicator is formed with a plurality of liquid-permeable ducts extending through a top wall thereof to provide fluid flow communication between the interior of the container and the ambient system. The ducts are physically dimensioned so as effectively to invoke surface tension molecular forces including capillary forces to preclude free flow of liquid through the ducts in response to gravitation alone, but to allow through flow of liquid when an outer face of the applicator is presented to and establishes contact between liquid contained in the duct and a surface to which the liquid is to be applied, thereby overcoming flow-inhibiting surface tension forces.

Abstract: A roll-on type applicator assembly including a ball-type plastic fitment secured to the collar of a liquid dispensing container, and a closure therefor. The fitment includes an integrally formed sealing ring which constitutes a sharp rim formed at the intersection of a pair of angled annular faces. The applicator ball is supported in the fitment by means of an annular array of spring plates which bias the applicator ball upwardly of and out of contact with the sealing ring when the cap is removed from the container.

Abstract: A container and closure cap therefor which forms a package unit, with the container having an open top, a continuous sinuous surface adjacent the open top, the sinuous surface including rounded projections merging into adjacent rounded recesses, a closure cap for the container, the cap having a skirt and an open bottom with a continuous sinuous surface on the skirt, the last mentioned sinuous surface shaped complementary to the container sinuous surface so that the sinuous surface of the closure cap is adapted to engage the container sinuous surface with the projection of one positioned in the recesses of the other when the closure cap is in closing position, one or the other of said closure cap and container having an annular wall portion offset inwardly of its respective sinuous surface and adapted to interfit within the other of the closure cap or container adjacent its sinuous surface to frictionally secure the closure cap to the container.