Berm Peak Water Bottle Product Overview Purist Mountain Bike Water Bottles shield the inside of the bottle from any bad taste, mold, or staining. As pure as drinking from a glass but with all the advantages of a flexible bottle. Specs and Features BPA Free and leak proof with the MoFlo cap MADE IN THE USA 22oz Rinse with warm water after each use to clean. Do not scrub with abrasive material.