Alright, what you do is you put your fuzzy (Wigwam is a good brand, as is LL Bean) socks into the dryer for a half hour. When it buzzes, you take 'em out and you cram 'em into a thermos. You put your thermos in your truck. You go do shit. When you're done doing shit, you take your socks out of the thermos and put them on your feet - and then you put on fuzzy slippers.
You drive home with nice, warm feet!
No, my socks are in the one that's plaid. It avoids the confusion. The other is a metal thing and greenish bluish - except I'm partially colorblind so I'm just kinda guessing as those two are the spectrum I have the most difficulty with. So, it's whatever color it is - but it has a dent.