Drinkwell 1.8 Liter Pet Fountain UK Water Capacity: The 1.8 litre Water Capacity is great for households with small dogs or cats, colour may vary between grey and light grey. Encourages Hydration: A free-falling stream of water entices pets to drink more, and helps prevent urinary and kidney diseases through increased hydration Filtered Water: The foam filter catches hair and dirt before they reach the pump; the constant water circulation in the bowl helps prevent bacteria growth Easy-to-clean: The BPA-free plastic design comes apart for easy cleaning and features less hard-to-clean corners and crevices Customise Water Flow: The adjustable water flow lets you customise the stream for you and your pet; stream can be turned off for a more quiet operation