Tupperware 3-Piece Mixing Bowl Set 4- , 8- , 12-cup bowls for mixing, serving, and storage Virtually airtight, moisture-proof seals preserve freshness, flavor Made of rugged plastic; colored Sheer Ice with Emerald, Amethyst, Ruby seals Stack for compact storage; nest when empty; dishwasher-safe Lifetime warranty against chipping, cracking, breaking, peeling