this ones are great, i used to have these but in plastic, heavy ones, cause my puppers also tipped them over.

also have this great ni slip thingy on the bottom so it wont slide.......

http://www.petsmart.com/global/produ...N=2025790&Ne=2 http://www.petsmart.com/global/produ...N=2025790&Ne=2
http://www.petsmart.com/global/produ...N=2025790&Ne=2