Hey, I am wondering if anyone has any ideas on a water heater/bowl that wont freeze? Preferably into 30 below 0 Fahrenheit range. I tried the system with the aquarium heater, fountain pump and thermocube with a cooler, but the water cups im using are just allowing the water to freeze in the cup and I have a fairly good inclination that nipples will freeze as well. It hasn't even gotten below zero yet and im lugging hot water out every morning for the birds and the same when i get home from work. Any suggestions are welcome.