I'd like to share my water bowl 'system'. I got this idea from Adam, and I love it because it's so easy and clean for the snakes. I buy 4.5" plastic deli cups from foodservicedirect.com in a case of 500, and each week I give the snakes fresh ones, and throw out the ones that they used. For bigger snakes, I go to the hardware store and get PVC couplers to set the cups in. They are heavy and the snakes don't knock them over. Here's one like that in my blood's tub.