Some Austrian engineers with too much time on their hands hooked up some copper coils to a heat to a heat pump on an exercise bike. On one side you have the coils warming things up, and the other, it cools them down. Just think of it this way, you do a little biking in the morning to warm up your coffee, then a little biking in the evening and reward yourself with a beer.

Or you could just leave the beer in the fridge, yeah, that works too.

Original Story: TreeHugger