Kinetic Tritan Series 8-Piece Rectangular Food Storage Set Includes 4 Containers and 4 Lids 88000 Nullify Imported BPA Free and FDA Approved Set includes 4 Rectangular Tritan copolyester Plastic Containers and 4 Lids: 2-6oz, 1-41oz, 1-86oz Tritan is a resin made 100% in the USA by Eastman Kodak. Crystal Clear Containers are airtight and watertight as well as stain and odor resistant. Patented locking 4 tab lid with silicone seal helps food stay fresh up to three times longer. Refrigerator and freezer safe. Dishwasher safe. Microwave safe without lid attached.