How To Keep Your Feet Warm At 30,000 Feet

The air vents in the planes we fly are in the front, and down at the floor. That translates into one thing: cold flight attendant feet. I was shown the way around that by a clever girl. Ordinarily, when you're cleaning up the galley, you pour all the liquids into a doubled plastic bag, tie it off, and throw it away, so that it doesn't leak all over the place. Well, this girl poured the extra coffee into a bag, took her shoes off, and blammo, caffeinated foot-warmer. She prodded me to try it and I said I would do no such thing and how dare you even suggest such a preposterous action.
Later, when she wasn't looking, I gave it a shot. Who knew?