Help keeping a nipple waterer from freezing - no electricity available

[MarieNC]

My girls use a nipple waterer since it really cuts down on the mess. With a regular waterer they were always getting sand in it, no matter how high up off the ground I put it. But the problem with the nipple waterer is that it constantly freezes overnight. I don't mind thawing it out every morning, but what can I do when we go out of town for a couple of days for the holidays? I don't have electricity available in the coop. Any ideas would be greatly appreciated!

 

[Bear Foot Farm]

Without electricty, about the best you can do is put it where the Sun will shine on it

 

[chickendogfarm]

try insulating the outside of reservoir with bubble wrap...that may help to a certain point

 

[Arielle]

I'm faced with the same problem. How to keep water from freezing overnight without electricity.

I'm trying to figure out how to use a rice sock(athletic sock filled with rice); use it like a heat sink. Haven't figured it out though . . .