This dog water bottle is not very convenient AT ALL. First of all, it's definitely not spill-proof. Even when the bottle is closed, it leaks if it goes upside down or falls over in the bag you're carrying it in. Also, there is really no way for the water to get back into the bottle if the dog doesn't drink it all. This isn't a problem if you're outside but I am using it with my service dog and there isn't always a place to pour out leftover water. And then if you do manage to get rid of the water, or your dog drinks it all, you have to find a way to dry the thing off otherwise when you close it there's going to be water/spit all over the bottle. Dislike. :(