Snapware Airtight Food Storage 6-pc Set Microwave, dishwasher and freezer safe Durable airtight gasket seal Modular stackable design, 6 piece items of 3 containers & 3 lid. Easy open-and-close four-latch polypropylene lid Microwave, dishwasher and freezer safe Durable airtight gasket seal Modular stackable design, 6 piece items of 3 containers & 3 lid. Easy open-and-close four-latch polypropylene lid BPA free polypropylene container and lid