Abstract: A clip (14), designed for use with a container (12) having a lid (20) movable between an open position and a closed position, includes a base (40) adapted to be inserted into a cavity (30) in the container (12) and a resilient arm (50) extending from the base (40). The base (40) has a projection extending therefrom, adapted to be received in an aperture (32) in the container (12) to affix the base (40) to the container (12). The arm (50) is adapted to temporarily deflect in response to a closure force upon the lid (20) to permit the lid (20) to move from the open position to the closed position. The arm (50) is further adapted to retain the lid (20) in the closed position. The clip (14) is used with a container (12) having a bottom (16), four sidewalls (18), and a lid (20) movable between an open position and a closed position to form a container assembly (10).