Some water bottles are pretty troubling. Most should just have a ball bearing in a tube. Some don't work well if you don't squeeze them first to get the air out.
In general, most bunnies drink more water from a bowl, and then you avoid the problem of the bottle malfunctioning. I offer both a heavy crock of water (I think it's a dog bowl), plus a bottle, just in case they run out or soil the bowl. I used to use a bottle, then I noticed my bun would always drink from my cat's bowl! I guess he was trying to tell me something!