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A thin pillow filled with chemicals that absorb heat when
shaken. Wrap it around a couple of beer or a bottle of wine
and stick it in your backpack when you go hiking. By the
you're ready for your break your beverage (or other treat)
should be pleasantly chilled.
There should be a
'switch' to prevent freezing when
inapporopriate, of course.
only big coolers here, tellingly the only image is of a grill [serfikon, Oct 04 2004]
||Absorb heat when shaken? How does that work?