content: I gave this a two star rating based on the fact that mine was to be used for a larger dog. This product would be adequate for a small dog. But the opening for a dog with a larger muzzle is not large enough. The claims for not spilling water seem to be true. However, since only about an inch of water is in the bottom of the opening at any time, it's more difficult for a larger dog to get his nose in and get a good drink. I guess if the dog were extremely thirsty and had no other water supply, this could do in a pinch.