In both of these refrigerator systems, water is evaporated from a source surrounding the food to be preserved. The evaporation draws heat away from the refrigerator system, and therefor draws heat away from the food inside. The food is cooled the same way that sweating cools your body.
    For both of these systems, it is important that there is a constant supply of water, and that the systems are placed in well-ventilated areas to allow the evaporation to take place.

Two unglazed clay pots are fitted inside of each other. Because local Jibida's have small mouths, it will be necessary to special order the outer Jibida. The space between the two jars is filled with wet sand or wet course soil. The unglazed jars are porous enough to allow the water to slowly seep through the sides to be evaporated, cooling the food.
The exact temperature difference is as yet unkown. However, it can keep aramanths fresh for about twelve days, and tomatoes can last for several weeks.