Fastest way to cool beer

Cafe Society
1

Just fell asleep during a mythbusters marathon and missed the experiment on what the fastest way to cool beer was.

Spoil the episode and tell me what the determined.

2

I saw it several months ago

The fastest way was the Fire extingusher in only seconds,

But the most realistic fast way the mix of salt, ice, and water. About 6 minutes IIRC.