I have used many different types

Ceramic ones - Heavy and bulky to carry downstairs to wash and I use to break at least one every time I would clean them too, so I gave up on those.

PVC Coupler and deli cups - Still have some animals tipping them so I moved away from those as well except for my males.

Now I mainly use those



$1 each at the Dollar tree store, lightweight, plastic, work great no more tipping.