More refreshing water is right this way. With this Contigo Replacement Filter for Wells Filter Water Bottle with AUTOSPOUT Straw Lid, you can continue to enjoy water with 99% reduced chlorine* anytime and anywhere . This filter lasts 3-5 months and replaces 450 (16.9 fl. oz.) single-use water bottles​ for an environmentally conscious choice, and can be used with any Wells or Wells Chill Filter Bottles. To clean, simply rinse the filter with water only. *Meets NSF 42 standard for reduction of Chlorine (taste & odor) and particulates (Class VI)​