Kinetic Go Green Glassworks Elements Series 6-Piece Square Food Storage Set includes 3 Containers and 3 Vented Lids 55079 N/a Imported BPA Free and FDA Approved Set includes 3-27oz Square Glass Containers and 3 Plastic Lids Featuring a Vented Lid for Microwave Use; Patented locking 4 tab lid with silicone seal helps food stay fresh up to three times longer Oven safe up to 450-degrees Fahrenheit without the lid; Refrigerator and freezer safe; Dishwasher safe, top shelf recommended for lid Removable Silicone Seal for easy cleaning