I have a rather particular cat, Spaz. He has to have a full glass of water on the sink, and he drinks from it. If it is not completely full or clean, then he will meow until I clean and fill it. He has gotten the other 2 cats to drink from the glass as well. If I put a dish of water next to the food, it gets tipped over and then I get a clean floor when I clean it up. He will drink from the faucet in the bathroom, if I let it trickle, but that is wasteful, I would rather clean and fill the glass at least 2 times a day.