It's a very tough plastic. We haven't had that problem, but I'm sure you could get a replacement if needed.

Pricey but we have this and love it. https://aquapurr.com/

We've had it for a couple of years now and no issue at all (other than our cat is dumb as a post and it took her a bit to learn lol). The owner was really wonderful to deal with as well. My favorite thing is it's fresh water without having to deal with filters and stuff. Would recommend!