PHILIPS Water GoZero Fitness Filters, Replacement Filter Cartridge, Activated Carbon Fiber Filter, for Active Bottle, (3 Counts), AWP287/37, 20oz

Innovative filtration system: the innovative activated carbon fiber filter, when compared to a conventional carbon block filter, adsorbs impurities faster, instantly improving the taste of tap water by reducing up to 99% chlorine. A complete water system: the active bottle is designed to work with two interchangeable filters to transform your fitness bottle into an adventure bottle or vise versa. Easy replacement: visual indicator lets you know when to replace the fitness filter (replace the filter every 4 weeks or 52 gallons). Good for the environment: lower your carbon footprint and help contribute to a healthier planet by reducing your use of disposable bottles.