Abstract: This disclosure relates to a ring and plug closure designed to prevent "plug popping", the closure including a plug having a generally annular U-shaped plug portion or channel defined by inner and outer plug walls and a bight wall therebetween, the inner and outer walls merging with a respective radius and a curl, the ring including an annular channel defined by inner and outer channel walls and a bight wall therebetween for receiving the plug portion, the inner and outer channel walls merging with a respective radius and a curl, and a frusto-conical wall disposed immediately adjacent the last-mentioned radius and being inclined at a predetermined angle to the plane of the outer channel wall such that upon the insertion of the plug portion into the channel, the plug curl bears against the radius of the ring to move the latter axially inwardly of an associated container body to progressively deflect the frusto-conical wall toward a reduced angle which in turn creates forces which deflect the outer walls of the

Abstract: A two-piece shock absorbing closure defined by a ring and a plug, the plug including a centrally generally circular unreinforced concavely axially outwardly opening end panel, an annular axially projecting plug portion bounding the end panel, the ring including an axially opening annular channel for receiving the plug portion, the annular channel being defined by inner and outer channel walls and a bight wall therebetween, a wall radially outboard of the outer channel wall responsive to insertion of the plug portion into the annular channel for radially inwardly deflecting the outer channel wall to bring the same into intimate friction engagement with the plug portion, and another wall between the end panel and the plug portion for effecting the deflection of the end panel from its concave configuration to a convex configuration in response to shock forces imparted to the closure and/or an associated container thereby absorbing said shock forces to prevent plug popping.