Does it look like the water bottle is placed at a comfortable height? It’s actually a good idea to keep both a water bottle and a bowl in her cage. The bottle will be there in case she spills the bowl, and the bowl will be there in case the bottle sipper gets stuck. Will a larger bowl fit in her cage?

Water bottles take more effort to drink out of than the bowl, which is probably why your rabbit may be staving off on drinking from the bottle. Is the ball in the bottle easy to push? I know some are a bit tougher than others, which makes it even more unattractive to get water from. I’d recommend putting out multiple bowls of water then. They are relatively cheap at pet stores, or you can use human bowls with a low lip too.

If you washed the bottle, then your last bun’s scent shouldn’t be on it so I don’t think it would affect her. Luna goes back and forth between bottles and bowls. She’ll use a bottle for a few months, then she’ll ignore the bottle and only use the bowl for awhile. Maybe you could try moving the bottle to a different spot in the cage? Some buns like their water by their food, some buns like it away from their food, other want it in the left corner instead of the right, etc.

I think a bowl filled with water is more comfortable than a water bottle. Rabbit does not have to make efforts while drinking. Try the method and see if she is comfortable with it or not.

Just use more than one bowl?