If you have ever owned a cat or dog, you know exactly the kind of stress you have to undergo every time you leave your pet home alone and you cannot quite remember if you filled its water and feeding bowls before you left. But there are plenty of automatic feeders available in the market, and that really eliminates the need for you to pay a pet sitter to look after your dog every time you have to leave town for a trip. What really impresses me about this new Automatic Pet Water Bowl is that it does not use any fancy electronics so I don’t have to worry about finding my dog cooked in case of a short-circuit involving the water bowl. Instead, it uses the laws of physics to refills the bowl via a garden hose or a water bottle. Gravity ensures that the water flows straight into the bowl, keeping it full every time the water level goes down while a float valve auto shuts the supply to avoid overflowing and wastage of water. For $29.99, you cannot ask for a safer automatic pet feeder.