Lock&Lock Bisfree Round Tableware with Leak Proof Locking Lid and Divider, 3.8-Cup Green premium, tritan new material with no bpa(bisphenol-a), reduces co2 in manufacturing, can be 100-percent recycled Heat-resistance premium, microwave for heating up foods ok, sterilization in hot water ok, freezer ok Design premium, crystal clear and shiny surface, stain and odor resistant Durability premium, strong material resists scratching, dishwasher safe, capacity 31-Fluid Ounce Airtightness premium, lock&lock's well-known airtightness, blocking air and minimizing evaporation, it keeps food fresh