Abstract: A plastic drinking cup which is integrally connected with one or more elastic closures for the open ends of bottles and/or openings in the top walls of metallic or plastic cans. A closure can be provided at the inner side or at the outer side of the bottom wall of the cup, at the inner side or at the outer side of the tubular wall of the cup, or at the inner side of a transverse wall which is inwardly adjacent to the bottom wall. The closure can constitute an integral or a separable part of the cup, and the latter can be provided with a relief valve to allow for a reduction of pressure in the interior of a bottle or can whose open end or opening is sealed by the closure. The cup can carry two closures, one with a concave internal surface to sealingly engage with and to swivel relative to the partly spherical external surface of a bottle and the other for a can. Each closure can be manually applied to or disengaged from the bottle or can.