All water bottle will come with attachment hardware. I did find some bottle at the pet store here that had spring loaded balls. I never heard any of the clunkity' noise I usually hear with the plain water bottles. They are a dollar or so more. I don't remember the brand, they have made their way to the trash bin after they started leaking like all bottles do. I would not recommend them for very old or very young rats, just in case they can't push the ball against the spring.
I have been searching for water bottles that will not leak after two months and less. Any ideas there?