My guys just have a big-ish stainless steel bowl. It lives next to Meg's food dish. Conveniently close to the kitchen sink, where it is dumped, rinsed, and refilled a couple of times a day. I have a thing about water sitting out for two long. I'm like the kid in Signs. I have about 10 water glasses/bottles sitting around at any moment, because I always need a fresh one. I can't stand my water, or the dogs', sitting around.