If you ever find yourself in a post-apocalyptic situation where you have no electricity with which to run your refrigerator then you're gonna be really glad you watched this video by Applied Science before it all fell apart.
In the video host Ben Krasnow discusses the fact that rubber bands feel strangely cold when they contract, then Ben shows us how he put this odd property to work making a rubber band powered mini-fridge.
Ben's creation is more of a proof of concept than a revolutionary new form of refrigerator technology, but it does seem to work so take notes that'll survive the fall!