Farm Innovators 3 gal. Plastic Heated Poultry Fountain HPF-100
Product Review (submitted on December 1, 2013):
If you want to keep dry do not buy! The base falls off very easily when turning upright or transporting it to its location. At least every other day either I or the coop gets soaked when the base falls off. Just the other day it fell off, went back to the barn to get another pail of water and filled again and if fell off a second time. Took 3 times to fill it and get it in the coop.