Releasing LPG (Liquid Propane Gas) from it’s container is a cool thing.
I mean – cold, actually.
You can use the release of propane to chill beer – much faster than the ice/water/salt method. Do it right, use a coil and you’ll have iced beer in a few seconds.
OK. It’s stupid cuz its expensive, but fun things usually are.
I’m sure there’s a video but I couldn’t find one on the usual tube.