Abstract: A reusable cap for closing carbonated beverage containers or the like, consists of an internally threaded shell having a fitment therein which sealingly engages the neck of the beverage container at the free edge thereof. The shell and the fitment are constructed of different plastic materials and are injection molded in different portions of the same molding cavity. First, the fitment is formed and then, without moving the fitment from the position in which it was formed, the shell is formed, to produce a unitary structure in which substantial portions of the fitment are imbedded in the shell.

Abstract: The disclosure concerns a screw cap comprised of semi-rigid plastic material and including a tamper-proof hold ring. The screw cap is for use on the neck of a container, such as a bottle. The hold ring has an inside diameter that is at least equal to the outside diameter of the cap body. Six lock lugs supported on the ring are inclined upwardly and inwardly toward the neck closing end of the cap body. The lock-lugs elastically hook behind a collar or mating ring at the bottle neck to prevent the tamper-proof hold ring from being lifted off the neck of the bottle when the cap body is unscrewed. Breakable attachment tabs initially hold the cap body to the tamper-proof hold ring and these are broken as the cap is initially unscrewed. An unbreakable flange between the cap body and the tamper-proof ring serves as a tilt hinge for the unscrewed cap.