6 in one, half dozen in the other .... the deli cups cost me pennies a piece and I get them shipped directly to my door every other month. I hold them in place with 4" PVC couplers from home depot ... Even my HUGE normal girls never ever tip them over.

When you have 250+ animals, storing an extra 250 water bowl becomes a problem ... also, you still have to soak them each week ... the deli cups get thrown away every 7 days.

-adam