Materials have been approved to meet FDA standards. QUANTUM Stack and Nest Tote Boxes are the ultimate reusable shipping container. Tough, dependable boxes are constructed of injection-molded, high-density polyethylene. Will not rust, corrode, or crack and are chemical-resistant and waterproof. Withstands temperatures from -10 to 250F. Stack with or without lids and turn 180 to nest when empty. Ribbed design prevents jamming when nested. Bottoms are textured to ensure safe, non-slip conveyor transit. Handle grips for easy handling. Order totes and lids in carton quantities, priced each.