Abstract: A cover for a drink container, preferably a disposable container, having a rim, said cover made from a resilient non-metallic material, preferably a thermoplastic polymer, and comprising a peripheral rim section adapted to fit snugly over the rim of the container and a resilient cover panel extending between the confines of said rim section to cover the container, said cover panel having a weakening line defining a flap and a hinge for the flap, said flap having a raised pull-tab which may be grasped and pulled so that the weakening line may be torn and the flap opened by folding at its hinge section, said cover panel also having a depressed well section which is of such size and shape and so positioned that when the flap is folded over on its hinge, the pull-tab may be nested in the well and the flap thereby retained in an open position.

Abstract: A tennis racquet with variable center of gravity and balance which comprises (a) a head, a handle and a grip, with the handle comprised of two side frames, (b) a weighted mechanism slidably mounted between the two side frames, and (c) ball and detent means between the weighted mechanism and the side frames for readily maintaining the position of the weighted mechanism at intermediate positions between head and grip as the weighted mechanism is slid back and forth between the head and the grip, thereby shifting the center of gravity and the balance toward the head or the grip.