I just got chickens and discovered that they will, if given half a chance, knock over any water container. So, I decided to make an automatic waterer. I have a party balloon helium tank I was saving because it looked like it would eventually be useable. I took off the balloon filling part and pulled out the valve for filling the balloons. I was left with the big plastic nut. I ran a piece of flexible plastic hose (I had some oxygen line from a salvage store) and epoxied it in place. I cut a hole near the top and put in a PVC valve and hose fitting. The idea is a gravity fed waterer that will hold about 2 gallons. That should be enough for my birds for several days. I have to find a watering trough to hook it in to and get some more epoxy. But, for a "found" device, I think it will work.