Self-Cooling Beer Can
(Click on the above link to view source material)
"Looks like a normal 500mL can, but features an integrated self-cooling device that reduces the contents by a minimum of 30 degrees Fahrenheit in just 3 min.

When activated, the all natural desiccant (drying agent) contained within a vacuum draws the heat from the beverage through the evaporator into an insulated heat-sink container."

Whatever that means...
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