Aquagear Straw Cap Replacement Filter for Aquagear's Klean Kanteen/HydroFlask Straw Cap - Removes Chlorine, Fluoride, Lead - BPA-Free 75 Gallon Filter Capacity REPLACEMENT FILTER for the Aquagear Filter Bottle EPA/ANSI certified & exceeds NSF standards 42 & 53 Removes up to 99.99% of tap water contaminants, including 90% of fluoride Filters are made in the USA Produces up to 75 Gallons of filtered water