Bake - Store - Reheat - Serve A multi- purpose glass solution that keeps your food fresh and offers convenience with even more possibilities than ever before. We are proud to extend our heritage of quality storage solutions to the all-new glassware collection. Introducing Tupperware PremiaGlass Serve & Store Container. Bake, store, reheat, serve: A multi-purpose glass solution that keeps your food fresh and offers convenience with even more possibilities than before. 100% Borosilicate glass with truly see-through storage that delivers the flexibility of using it in the freezer, microwave, and oven. Set includes 1-Qt./1 L glass container with seal and 1.5-Qt./1.5 L glass container with seal. Remove seal before using in the oven.