I use a ceramic bowl made by Living World (I believe). It's made for guinea pigs, safe to be put into the dishwasher, and doesn't tip when Ksusha stands on the rim. She tried picking it up with her teeth by the rims initially but since her teeth can't sink into it, she quit doing that pretty soon. It's not wider at the bottom but she wouldn't be able to tip it with her nose either because there's no way for her to get her nose underneath it. I'm pretty happy with it. It cost me about 6 bucks at PetCetera.
http://www.petutopia.co.uk/images/pr...2900_61665.jpg This is a picture of this bowl. I'd rate it 5/5 but to each, his own, right?
Good luck on the bowl hunt