It adopts PE materials, and the production materials comply with the regulations of F.D.A on the grade on PE materials for food (F.D.A. Regulation on Polypropylene: the requirements of U.S.21 CFR F.D.A. Regulation Part 177.1520, portable containers clauses (C) for food contact use),and it is superior in its high intensity, good toughness, good Rigidity, heat and cold resistance