Refill your Brita Refillable Water Filter and drink cleaner**, great tasting tap water with 80% less plastic waste* over 3 years. For use with the refillable filter shell (sold separately), this innovative filter uses activated carbon made from coconut husks to reduce chlorine (taste and odor). Heres how it works: just change the filter refill and keep the reusable filter shell. Certified to reduce Chlorine (taste and odor), Copper, Mercury and Cadmium***, one refillable filter can replace up to 300 16.9 oz single use plastic bottles. *Vs Brita Standard Filters. **Cleaner vs. tap water. Healthier based on health contaminant reduction per WQA certifications. Substances reduced may not be in all users water. See certifications. ***Meets same WQA certification to reduce chlorine (taste and odor) by WQA as Brita Standard filters. See certifications.