Abstract: A protected glass container for cosmetic and like substances, has an inner glass jar and an outer plastic protective jacket, both said parts having coengaging top rim portions arranged to position and secure the parts together. The rim portion of the glass jar engages the sealing liner of a closure cap, which has screw threads engageable with cooperable threads on the rim portion of the plastic jacket. The jar and jacket have spaced-apart side and bottom walls, and the rim portion of the jar is subjected mainly to compressive forces which are non-destructive. Tightening of the closure cap tends to increase the interlock between the rim portions of the jar and jacket.

Abstract: A one-way stopper plug for bottles and the like, comprises a one-piece resilient plastic molding consisting of two mating halves joined to each other by an integral living hinge whereby the entire unit can be molded in one operation. Each half has a semi-cylindrical wall and two transverse walls at its ends, said walls having planar edge portions adapted for co-engagement when the halves are folded together, thereby to form a complete cylinder. The living hinge connects two of the transverse walls together. The mating halves define a channel therethrough, and a back-check valve disposed in the assemblage operates to limit fluid flow in only one direction. Forcing the assembled halves into a bottle neck maintains them in their assembled relation.