Tempra Technology has made the world's first self-chilling can!  This can is the same size as a 500 ml beverage and has a self-refrigeration device.

All you do is to twist the bottom.  Tempra's 'proprietory engineering' creates a temperature drop that can reduce the temperature of the contents by 30 F in 3 minutes!

No, it does not use chemicals that harm the environment.  An all natural desiccant in vacuum draws the heat from the container thro an evoporator into a heat-sink container.  This 'vacuum-power' lowers the temperature very quickly.

For more details on how this works, read more....

The cross-section explains how this works...

Here is a temperature graph ...