Tupperware Heat N Serve 8.25 Cup Oval Container Store, freeze, microwave, reheat and serve, all in one container. Sleek, beautiful design and Cosmos Black finish are ideal for any serving setting No-worry valve is the first of its kind on the market; automatically adjusts to allow steam to escape during microwave reheating. Valve color may vary. Raised hub in center of base ensures even heating of contents, from center to edge 8  Cup (2 L) Oval Container