Our latest 2014 collection now comes with three replacement filters with enhanced charcoal and fibre for long lasting results. Drink well Premium Replacement Charcoal Filters keep your pet's water tasting clean and fresh. The premium filter segments the charcoal into 6-compartments reducing the settling of the charcoal and enhancing overall filtration. Each filter features a duo-density polyester pad that catches hair and debris, while the charcoal removes bad tastes and odours from the water making it more appealing to drink.