PP new water bottle flip cap: 1,food grade PP ... flip top design 4,fit most bottles Our PP new water bottle flip cap:How to clean a cap? ... of the bottle with vinegar; then, rinse under water. 4) Wash the cap with a clean, vinegar ... the beach, we needed the strongest, lightest stainless steel water bottle we could get. So did all our friends ... feel free to contact with us! PP new water bottle flip cap