We now have self-heating coffee.
It's true! One of my supervisors brought these nifty little cans in today, and we just spent about five minutes all crammed into the break room, trying to see if they work as advertised--heating the contents of the can by a reaction between minerals and water in the can lining.
I feel as though I've entered some kind of near-future world. I'm sure we've been able to do this kind of thing for a while--but selling them en masse? Hee.
[yes, I'm reading HBP now...was up till 2am last night and consequently late to work...and I'm only through chapter 13.]