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Chinchilla-safe material for food-bowl

My chinchilla is, for the most part, a jerk. She is adorable, though, so I'll keep her. I can keep up with all of the ways she tries to antagonize me (I've come to the realization that she really is out to get me :P ), except for one. She often pushes her food bowl off of the ledge. I would move it to a lower area in her cage, but, as I came to realize the first time, she poops into the bowl when it's below her. So, I must keep it on this ledge.

I therefore need a way to attach and un-attach the bowl to the cage (so I can fill it with food afterwords). I could just go and buy one of these food-bowls,  but I'm too cheap and like to make my own stuff, anyways. So I have two questions - what material would be best for attaching it to the cage, and would hot glue work as an adhesive? I am worried about her gnawing on the stuff, because I know certain things can kill her if she eats them (eg: Paint). Thanks! :)