Kinetic Go Green Glassworks Elements Series 6-Piece Square Food Storage Container Set includes 3 Containers and 3 Vented Lids 55094 BPA Free and FDA Approved Set includes 3-10oz 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 Fahrenheit without the lid. Refrigerator and freezer safe. Dishwasher safe, top shelf recommended for lid. Removable Silicone Seal for easy cleaning