8 Essential Tips from 'Arctic,' the Best Survival Movie in Years
Arctic explorers would carry their water bottles under their coats, on the ridge between their shoulders, right at the bases of their heads. That would keep it from melting without getting in the way of other stuff they had to carry.
They would also not drink their bottles all the way empty. Leaving a little water inside kept the refill from freezing.
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Most foods spoil because of the growth of microbes. Preserving food is an attempt to limit microbial growth. Food can be preserved by drying, salting, chilling, or storing in air-tight containers.
Preservatives are used in foods to extend their shelf lives. One of McDonald's Big Mac in Iceland is an example of a long-lasting processed food. It has been on display since 2009, in a glass box. Preservatives that has been discontinued by McDonald's are: