When you loose power you no longer have the ability to keep your food cold in your refrigerator. Without opening your fridge you food will stay fresh for about 2 hour as long as the temp doesn't go above 40 degrees but if the power is out for more than 4 hours you will lose all of your perishable items you have stored (meat, poultry, fish, eggs, and leftovers).

Conventional refrigeration does an incredible job keeping food fresh. But that technology doesn't help without steady electricity. A more recent development in refrigeration—the Zeer pot-in-pot refrigerator—only requires water, sand, and a hot, dry climate to preserve produce through evaporative cooling. Here's how to make the simple gadget.

Materials and Tools Required

  • a bag of sterile sand
  • a trowel

Building It


How It Works

Thanks Gizmodo