Farm Innovators Heated Pet Bowl, 1 Gallon, Blue
I have the gallon size..or the bigger one. I rescue and feed stray/feral cats.Perfect for winter months. Water never freezes. After a heavy snowstorm, you might find some ice around the rim but the water is still not frozen in the bowl. Mine lasted for 4 years. It finally died today, so off I go to Walmart to get more. This time I'm getting 2 of them. You never know when they stop carrying items like these.