Part of a larger theory that more things should turn into self-inflating life rafts, but the beer cozie seems like such a logical vehicle. Drinking beer is often associated with both large bodies of water and poor decision making. You will be eternally heralded for thinking ahead when you are crammed into a boat full of grateful drunks.-- jennb, Mar 12 2004 Figure out how to get all the required material into a 1 in^3 volume, and I'll bun it. (this includes all the material to make the raft, plus the inflating mechanism. It needs to be at least big enough to float one person comfortably.)-- Freefall, Mar 12 2004 All you need is a CO2 cartridge stuck on the side, and make the cozie out of balloon material. You won't get a whole liferaft, but at least something that can keep your head above water. As a bonus, it could be used to un-flatten your beer in an emergency.-- Worldgineer, Mar 12 2004 random, halfbakery