About this item Oliveware Joy Round Glassware 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. They are transparent and display the content. 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 Oliveware Joy Round Glassware 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. They are transparent and display the content. Glass containers can be reused and recycle helping and maintaining a clean environment. With vent lid and snap closures.