Earthen pot & pottery it is used all over India, as well as Pakistan, Bangladesh and Sri Lanka, as a home "water storage cooler". It has been in use since ancient times and can be found in houses of every class.
Making process
They are made by the combination of two types of mud clay: the first is taken from the surface of the earth and the second after digging more than 10 feet deeper into the earth. Making pots & pottery takes a considerable amount of time. It is a long process of at least 8 days. The clay is mixed with water, shaped, finished, polished, dried and baked in a kiln for 5 days.
At last it becomes a completed eastern earthen pot & pottery, a home water cooler, cocking house use work.