The self cooling beer can.
From The Sun
A self-cooling can that uses a vacuum to chill beer is set to be a big hit with the lads across Britain this summer.
Scientists say the temperature of the drink drops 16.7°C (30°F) in three minutes and stays cold for up to an hour.
They work on the same principle of evaporation that makes you feel cold when you step out of the shower.
The beer is surrounded by a watery gel which drains off when the bottom of the can is twisted.
The bottom itself also contains an insulated heat-absorbing gizmo.
That makes the temperature of the ale drop and creates a vacuum which should keep it cold for an hour.It’s enough to bring a grown man to tears; tears of joy…