is a traditional Spanish
container designed to contain water
. The botijo has the property that once filled and placed in the sun, it cools the water that it contains.
The botijo has a wide belly and one or more mouths where it is filled and one or more outputs called pitón o pitorro
to drink from. The botijo is a typical element of Spanish culture
and may vary in shape, color and material.
The operating principle of the botijo is as follows: the stored water is filtered through the pores of the clay and in contact with the outside dry environment (characteristic of Mediterranean climate), it evaporates
, producing a cooling (2.219 kilojoules
per gram of evaporated water). The key for cooling it, is by the evaporation of bleed water, as the water evaporates, it extracts