Seychelle Water Purifier Filter Bottle &ndash; 20oz Pull-top Bottle with Advanced Filter &ndash; Portable Filtered Drinking Water, Advanced Water Filtration & Purification Bottle 20 oz. Size is Compact, Light Weight and Easy To Use and Environmentally Safe! Does Not Pollute The Countryside Produces Up To 100 Gallons of Filtered Water or More Depending Upon The Quality of The Source Water Seychelle's Exclusive Filters Are The Most Laboratory and Field-Tested of Their Kind in The World. Tested to EPA Protocals and NSF/ANSI Standards 42 and 53 By Broward Testing Laboratories Reusable; Filter is Replaceable and BPA Free; Will Not Leach