Finally science comes up with something useful:

Three college buddies tired of leaky trash cans and warm beer at the bottom of the keg say they have the solution to better the beer-drinking experience.

It's a portable cooling wrap designed to make kegs more portable and to keep beer cold in pickup trucks, at the beach or in the back yard. Also, they say it would get rid of the annoyance and cost of ice replacement.

I'm pretty sure I even know how it works, because there have been PC CPU coolers using the same tech for years. I've just never heard of it on something this big before.