My guinea pig and drinking water?

No, hay is dry, there isn't any water in it. You could try giving him some lettuce and veggies with water on it. Why don't you just use a normal water bottle with the ball in it? I use one and it never leaks(except when i attach it to the cage or move it). I recommend just getting the other water bottle. It isn't worth your guinea pig getting dehydrated. If you get the other water bottle and are worried about it leaking, you can always put a bowl under it.