Here in wisconsin the weather can get well into the negatives and i need a water heater for my girls' plastic waterer. I'm hoping to make one for myself for pretty cheap. The waterer will be outside all the time. I need ideas, thanks!
I think if you use a waterer with heat you should use a metal one. I would be afraid that the plastic would leach chemicals into the water after being heated for so long. I won't reheat food in plastic anymore. Too many bad stories about chemicals especially from China.
There are heated waterers out there. I would buy one (I know money is tight) so you know it is safe and will work.
google heated waterers and see what you find. I have to put that on my list of thing to do for tomorrow.