Petsafe Drinkwell Ceramic Avalon Drinking Fountain with freshly filtered streaming water dogs and cats. The avalon drinking fountain contains two liters of water that are constantly circulated and filtered. The movement of the water stimulates pets to drink, which is beneficial for their health. The fountain is made of ceramic which is hygienic and easy to clean. A replaceable carbon dust filter takes out any dirty tastes or odors, which enhances the flavour. A replaceable foam filter keeps the pump and water cleaner by collecting dirt and hairs.