Oven safe to 450 degrees F (Only glass bases are oven safe). Seamlessly store & reheat. Glass containers with vented, microwave safe lids make reheating easy. 100% airtight & leak-proof. Microwave safe. Reheat only. Freezer safe. Dishwasher safe top rack. Smart Lid System. Stainshield plastic. Glass. Fits across all Brilliance containers.