I bought 2 of these at the Elkhart BigR today. I got the 5 qt. size. They were on sale for $12.99 -- normally $16.99. I need one of them for our ducklings for the winter -- they won't be ready to join the other ducks for some time & thought this would work for them. I'll use the other for the chickens. Already have one for the dogs and the big 3 gallon heated pails for the ducks and alpacas. Hope we won't actually need to use them for awhile yet!For anyone looking for ideas for heating water this winter, this is what we use. They worked great last year. They are cookie tin heaters, but we took the black heating element off the bottom of those blue heated dog bowls and attached them to the lid of the cookie tin. Cut a notch in the bottom of the tin for the cord, and cover it with tape or something to prevent the metal from cutting the cord. They are water proof and I like the idea of using a heating element that is safe for exposure in general instead of a light bulb.
Duct tape works fine for holding the heating element on the bottom of the tin lid. Ours worked all winter. The only thing that froze was way up in the top of the water container.