Preserving perishables without constant power

Food preservation is an age-old practice dating back to when our forefathers found innovative ways to preserve their fruits, vegetables, raw meats, and other perishables for days on end. These ancient methods included but were not limited to chilling perishables in natural coolers such as in streams and underground pits. Over the years with the advent of technology and electricity, humanity developed more convenient ways to preserve our foods and medicine, through our fridges, freezers, and similar cooling technology. Even with all this technology, many developing countries are still faced with a daunting issue, lack of constant power supply. This situation has led us to find other means to protect our essential perishables.

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