Around the world there are many botijo-like devices used to cool water or to
keep foodstuff fresh. Here are some examples:
In the year 2000 a Nigerian teacher was awarded the Rolex Award for Enterprise for
his utilization of the water evaporation cooling system to implement a food
preservation system for dry climates.
His implementation consists of two earthenware pots of different sizes, placed
one inside the other. The space between the pots is filled with wet sand, and
food is placed in the inner pot. The evaporation of the water in the sand
between the pots cools the inner pot, using the same effect used in a botijo. By
keeping the sand moist, the food in the inner pot is kept cool.
You can read a full description of this cooling device
markets the device pictured on the right. The water poured on
through a ceramic/activated carbon filter to the terra-cotta container below.
This container is
nothing more than a botijo, with a pretty dispensing spout and a fancy filter.
it holds about 8 liters of water and is allegedly made in South America.
You can purchase this device for a mere $160, plus $60 for each filter