any thing liquid will freeze ( and some will burst) dry foods -- chocolate and granola bars-- will do fine, but will taste awful at the end of the cold season.
Whatever you do....don't leave activated charcoal in your car if it can even possibly freeze.......nasty rupturing of the bottle and it won't be pretty......don't ask how I know... <img src="/images/graemlins/blush.gif" alt="" />
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