Milton casserole is made of foodgrade material with thermi-guard.The inner mirror finished liner parts are fabricated out of non magnetic stainless steel seat. The plastic outer body and lead components are moulded out of virgin food grade plastic polymers which gives chef a sturdy and beautiful finish. Transfer hot food from cooking vessel to this casserole, and it will keep the food hot for hours together. Always close the casserole with the lid cover. Milton Casseroles serve to preserve cold foods too. These casseroles can be used at home and for your outside picnics and barbeques.