Instead of a water bottle outside of the cage, you can use a water bowl. I have a large pretty heavy water bowl that can't be easily tipped over. Keep in mind no matter how heavy it is, if you put it on something the ferrets can get under it will get spilled. I got a Large microwave turntable tray (this thing is heavy) from the local thrift store. The ferrets cant get under it nor can they tip the water and food bowls that are on top of it. the tray keeps most of the crumbs and water contained and i just throw it in the dishwasher once in a while. the doors are open on my cage for 8 hours min. during the day. Hope this gave some of yall a good idea. Gerald Macy, Rambo, Diesel, Pepsi, and Bitsy (Dixie) [Posted in FML 6306]