Abstract: A container (10) is disclosed as including a receptacle (12), a cover (14), and a tether (16) that are molded from plastic unitary with each other with the receptacle and cover connected by the tether. Downward cover movement over the receptacle provides a snap action engagement of locking surfaces on mating helical threads (30) and (32) of the receptacle and cover in order to prevent opening movement of the cover without unthreading rotation. The tether (16) has a length that is sufficiently long to permit the initial cover closing and sufficiently short to limit unthreading rotation of the closed cover for opening with the tether intact. Tether (16) is frangible by either cutting with a knife or scissors, etc. or by breaking upon the application of unthreading cover rotation to thereby provide a visual indication of the cover opening in order to render the container tamperproof.

Abstract: A container (10) is disclosed as including a receptacle (12), a cover (14), and a tether (16) that are molded from plastic unitary with each other with the receptacle and cover connected by the tether. Downward cover movement over the receptacle provides a snap action engagement of locking surfaces on mating helical threads (30) and (32) of the receptacle and cover in order to prevent opening movement of the cover without unthreading rotation. The tether (16) has a length that is sufficiently long to permit the initial cover closing and sufficiently short to limit unthreading rotation of the closed cover for opening with the tether intact. Tether (16) is frangible by either cutting with a knife or scissors, etc. or by breaking upon the application of unthreading cover rotation to thereby provide a visual indication of the cover opening in order to render the container tamperproof.

Abstract: A container (20) disclosed includes a receptacle (22) and a cover (24) each of which includes a unitary member (26,28) molded from plastic. A helical thread (44) on the upper end of the receptacle side wall (30) and a helical thread (58) on a downwardly projecting lip (50) of the cover are engaged with each other in mating relationship by either threading of the cover onto the receptacle or by downward movement as the receptacle side wall and the cover lip flex to permit such engagement by a snap action. A retainer (46) on the receptacle side wall receives the lower edge (52) of the cover lip and a retainer (60) on the cover receives the upper edge (36) of the receptacle side wall so as to maintain the mating relationship of the threads with the cover in its closed position. The container has particular utility for use as a paint container especially when utilized with specific constructional features disclosed.