BPA Free and FDA Approved;Set includes 3-15oz Square Glass Containers and 3 Plastic Lids;Patented locking 4 tab lid with silicone seal helps food stay fresh up to three times longer;Oven safe up to 450ﾃ｢ﾂﾂｰ Fahrenheit without the lid. Microwave safe without lid attached;Refrigerator and freezer safe. Dishwasher safe, top shelf recommended for lid