51 fl oz (1.5 L) USB Cat Water Fountain with Filter and 3 Flow Speeds

A fountain keeps water moving, and many cats find a gentle stream more inviting than a still bowl. This one holds 1.5 liters (50.7 oz) and recirculates it through an arched spout into a shallow basin on top, passing it through a filter on the way back so the water stays fresh between refills.

Three flow settings let you choose how gently or strongly the water runs, which is handy when you are introducing a nervous cat to the fountain. It plugs in through a USB cable, so you can run it from a USB power source you already have. The unit weighs about 1.1 lb (500 g) and comes in many colors, including navy blue, light green, transparent, pink, forest green and cover-style versions in green, blue, yellow and pink.

The filter uses resin and activated carbon, and the pump needs regular cleaning to keep working well. Rinse the pump and basin often, replace the filter when the water looks or smells off, and never let the tank run dry while the pump is running. It is a small fountain meant for cats and small households of pets, so a thirsty large dog will drain it fast. Measurements differ slightly between color versions, so measure the shelf or floor spot you have in mind before ordering.