Lock & Lock 1/2-Cup Roll and Sausage Container, 4.7 Fluid Ounces 1/2 cups, 4.7 fluid ounces Made of high quality bpa free plastic Airtight seal with great elasticity power locks tightly with hollow-center silicon Microwave, freezer, and top rack dishwasher safe 1/2-Cup, 4.7-fluid ounce Made of high quality BPA free plastic Airtight seal with great elasticity power locks tightly with hollow-center silicon Microwave, freezer, and top rack dishwasher safe