I work in the oilpatch. If we need cold beer at the end of the day, I look for an N2 (or even CO2) bulker and bleed a small amount of liquid into a steel bucket. It always amazes me how fast a can of warm beer can freeze rock solid, after only a few seconds too long under a tiny stream of -280F nitrogen... You really only need enough vapour to full the bucket, and the cold will chill the cans of beer nicely. Don't try this with bottles! Just one drop of liquid N2 and the bottle implodes.
