Dogness Pet Fountain Cat Water Dispenser Healthy and Hygienic Drinking Fountain 2L Automatic Electric Water Bowl for Dogs, Cats, Birds and Small Animals (Pump with LED Light)

Incredibly good product for the price. Keep it topped up and you won't notice any noise (the pump is almost silent - the only noise comes from the burbling of the water). Perfect height for a cat. The filters are EXPENSIVE and wasteful, but I just cut a piece of synthetic foam batting (leftover insulation from a meal delivery box) to size and use that instead. My cat isn't picky about the taste of the water, so I don't need the carbon - just need something to catch bits of cat food since he doesn't wash his face between eating and drinking. I change the makeshift filter out once a week when I wash the fountain and just throw the old piece away. The filter chamber has a sieve too, which helps keep crud out of the reservoir.