Abstract: An upwardly open end portion of a plastic container straight sidewall is telescoped by an inverted U-shaped portion of a plastic engagement ring with a generally transverse, outward flange on the container sidewall snap interengaging with a similar engagement ring flange. An engagement ring U-shaped portion extends transversely inwardly having, in certain embodiments, either a simple or complex outer wall common with the inverted U-shaped portion and in all cases an interior wall spaced inwardly therefrom. An edge portion of a plastic cover overlies the engagement ring U-shaped portion and has a downward extension fitting therein divided into an exterior wall outwardly abutting the ring U-shaped portion outer or common wall and a transverse inward flange snap interengaging with a similar flange on the ring interior wall.