Folding Water Bottles Are Made of Food Grade Silicon Without Bisphenol a & Non-toxic & Odorless Materials. the Water Bottle Uses a Polypropylene Nozzle & a Food Grade Plastic Cap, Allowing Childrens to Use It with Confidence. Silicon Material Feels Soft to the Touch, But It is Also Highly Resilient & Can be Placed Firmly on the Desk Top. Designed to Make Travel Water Bottles Easy to Clean Internally or Add Water & Ice; the Leak Proof One Button Switch Allows for Easy Opening of the Lid. Lock Rings Prevent Accidental Opening of Bottles. It is Lightweight & Convenient, & Can be Used for Various Activities, Such as Business Trips, Picnics, Trade Exhibitions, Conferences, Sports Expos, Etc. Minimum Quantity: 500