The Drinkwell Multi-Tier Pet Fountain provides 2.95 L (100 oz) 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. The fountain features two places for pets to drink from, the elevated dish and the lower bowl.