What a great idea! I have been wondering how to get our waterers to stop freezing. I had bought a $55 warmer for our watering bucket but it seems it will only work on metal waterers and only indoors. Seeing I have only a small flock and they spend all day outdoors so this does not work for me. Y'all's Idea is just brilliant to me! I hate having to spend money on things and your idea will save me some cash (once it return the warmer!). Thank you for sharing and I will definitely be following y'all! God Bless!