rofl.

As soon as I read the title "Water bowl flipping." I immediately knew it was about a rabbit They're naughty little buggers

I dont like water bottles, as I feel they are harder to keep clean and rabbits drink so much more water from bowls - The more water they drink, the better, as it's the most important part of their diet. (If they aren't drinking much, they won't eat much, and eating constantly for rabbits is necessary.)

My rabbits have heavy bowls, my californian (13 lb rabbit) can't flip it, so what I would suggest is just get a heavy croc like other people have suggested.

And you should not immerse your rabbit in water, it can cause a severe shock to their system. What you can do is get a bowl with a couple inches of water and just wash his bottom off.