• Plastic is the primary material of national products and continues. It is strong, durable, lightweight and versatile. This is a key ingredient of our PP products which is durable and healthy plastic. Absorbs very little water and has good chemical resistance Polypropylene can be recycled, reducing waste and giving the product a lot of life through use and re-use. (Your concern is our priority) • Made of high quality material/Easy to clean and wash • National takes product safety seriously and all products are tested and comply with the most stringent safety laws and standards. As an Amazon Associate we earn from qualifying purchases.