Pepper's breeder said to get a bottle. She has never had a problem with it and drinks about 1/4 of it every night. I clean it regularly and she has never had a problem.
I put it down pretty low and watch her drink from it, her neck and back are fine!
But to each their own. If everyone else is saying to use a bowl, then I won't argue with them- they have WAY more experience than I do