Developed by a Veterinarian, the Drinkwell Platinum Pet Fountain provides 168 oz (1.3 gal) of fresh, filtered water to your pet. A patented free-falling stream of water entices your pet to drink more and continually aerates the water with healthful oxygen. A charcoal filter removes bad tastes and odors, giving your pet the best way to stay hydrated! This fountain features many upgrades and a built-in reservoir to increase capacity and makes refills easy.