SnapTainer™ food storage containers are BPA-free polypropylene plastic. They are 100% air & liquid tight with 4 hinged tabs and a removable silicone seal. SnapTainers are freezer, microwaveable, dishwasher safe, USDA accredited, & exceed FDA standards for food safety. Their modular designs are perfect for any storage needs; foods, liquids, crafts, electronics, hardware, etc. A “water impregnation” manufacturing method produces a surface which is highly resistant to stain and odor. Made in Korea.