I went to Walmart and got a large water bottle that has a tray under the bottle for the water. I made a stand to hold it on the side of the cage and hold it in place with a rubber spring line around the base. This works our perfectly! It can last several days with out running out even if you have several ferrets. Have had six ferrets using it and it worked out fine. They drink naturally, that water bottle is absolutely terrible for them to get a swig of dihydrous oxide from. Water Bottle.JPG [no picture here -- the FML does not allow pictures] As you can see I have a spare base. I use that spare when I change out the base and all. I fill the spare first and have it right next to me when I take the old one out, and put the spare in immediately and put the elastic retainer on immediately. You can kind of see the blue elastic on the base of the one on the cage. That way no one gets out and I can go fill the bottle and install it. Then clean the other one getting it ready for the next time. The big round shadow is the shadow from the hood on the lens that shadows the built in flash on my camera. I seldom use the built in flash but did today just to save time. If I took the hood off there would be no shadow. But . . . . .OH well !!!! Good luck! Many other places sell these water bottles, is not the big size but a smaller one I think this is the smallest size they make but is just right actually. Gordon and Pester Doodle BullwinkleEnvelopeDaffy [Posted in FML 6910]