Fontana / Pet drikker 3.5L Oneisall PW04Fountain Pet drinker 3. 5L Oneisall PW04 Proper hydration is the key to any cat's health. The Oneisall fountain makes sure your pet has constant access to fresh, filtered water. Thanks to its completely wireless design, you can set it up wherever it's most convenient in the living room, kitchen, balcony or even in the garden. In addition, the lack of wires eliminates the risk of overbiting them, making the fountain safer, especially for young cats.