... . 3.environmental pollution-free Calcium Carbonate Plastic Box For FoodHard plastic box for foodFolding plastic box for foodCalp box1.Waterproof , moistureproof , 2.transportation convenience etc.3.environmental ... in transportationProperties and features: square, material of Calcium carbonate, HDPE. Waterproof , moistureproof , good toughness, high strength, transportation convenience etc.Use: ...