PP new water bottle flip cap: 1,food grade PP plastic 2,leakproof approved ... ,flip top design 4,fit most bottles Our PP new water bottle flip cap:How to clean a cap? 1) Remove the ... , at the beach, we needed the strongest, lightest stainless steel water bottle we could get. So did all our friends. Now we ... u!pls feel free to contact with us! PP new water bottle flip cap