About this item Oliveware Grace Round Lunch Box is made using only the best borosilicate glass. FDA approved, Microwave (Without the lids), Oven, Dishwasher, Freezer safe (Without the lids). 100% leak proof and 100% BPA Free. Glass containers can be reused and recycle helping and maintaining a clean environment. With vent lid and snap closures. Heat & cold resistance -20C to 400C They are transparent and display the content. Oliveware Grace Round Lunch Box is made using only the best borosilicate glass. FDA approved, Microwave (Without the lids), Oven, Dishwasher, Freezer safe (Without the lids). 100% leak proof and 100% BPA Free. Glass containers can be reused and recycle helping and maintaining a clean environment. With vent lid and snap closures. Heat & cold resistance -20°C to 400°C