I would also like to know what you do to keep them warm in the winter or if it's even something to worry about. I bring it inside at the end of the day, but during the working day it is in the cab of the truck and the doors are closed. Is there some kind of blanket or seeing it's only an 8 hour day or so, should I not even concern myself with it. Now that I think about it, how do you keep joint compound warm inside the truck. I keep a small tub in there in the warm months and it's not an issue. I put it in my center console and have it wrapped in a shirt. Maybe that will work.