I had tons of issues with rodents chewing water bottles. I even had one afternoon of trying to cut OPEN a water bottle to get a rodent out after they chewed the bottom rim, then one crawled INSIDE and couldn't get back out.
My rats in the 55g tank drink out of a dish set up on another overturned dish as a platform. The rack rats can't get to the water bottles. Those things are too pricy to replace every time the rats decide they're bored.
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