When you want a frosty cold one, you usually don't have the time to wait for your pint glass to actually get frosty sitting in a fridge. So you probably settle for a less satisfying can or bottle -- a compromise you'll never have to make again with this countertop glass frosting contraption.
The device connects to a CO2 tank or cylinder you'll have to provide yourself, and using an oversized spout it fills a glass with a frosty blast that will have it chilled in about 10 seconds. A triumvirate of AA batteries powers a set of blue LEDs that add to the freezing effect (but not the process) and the whole unit clamps to the edge of a bar or table to prevent it from blasting off -- maybe.
The only downside is that in addition to the cost of topping off a CO2 tank ($20 plus $5 a refill) the unit itself will set you back a hefty $400. This means that all of a sudden drinking from a can that was floating in a cooler minutes ago doesn't seem like such a hardship. [Hammacher Schlemmer via 7Gadgets]