Other way of food storage

Did you know that there's other way how to keep your food from spoiling? Well in a modern world like America they are using a high technology cooler called “refrigerator” but for the world’s poor it’s difficult for them how to keep food cool since refrigerators are costly and need electricity. Apparently electricity is not common from the world’s poor. But everything has a solution, since spoiled food creates health risks they developed the called “Pot Preservation” or their cooling system with no electricity needed. If you can imagine it is a round containers made of clay, it’s double pot container and the smaller pot is place inside a larger one, its amazing invention! From the pot container they can put fruits, vegetables or drinks, it keeps food from spoiling, safe from harmful bacteria, and it could keep food safe for several weeks. Its popular in African countries.