When my wife and I were on our honeymoon, we had a mini-fridge in our hotel room.  So we could bring leftover food back to our room from restaurants without the fear of it spoiling by the time we were hungry again.  But there was one problem: we didn't have a microwave!

So the next time you're in a hotel and about to dig into some cold leftovers, remember that you actually do have the materials to make yourself a hot meal!  Give this a try...