I think you're right Doug.
Inside there's a chemical mixture that reacts when exposed to air or
moisture. To keep camera gear warm, be sure to get the "exposed to air"
variant.
Though i guess all chemical reactions like that will go pretty slow at deep
freezer temperatures.
Jostein
> -----Original Message-----
> From: Doug Franklin [mailto:[EMAIL PROTECTED]]
> Could he be talking about those little "keep warm" packets
> that you can
> get at camping stores? You know, the little bags that you squeeze to
> break a container inside, then it generates heat for a couple of hours
> ... sort of like a Cyalume stick for heat instead of light.
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