Water Storage Pot made up of Terracotta Clay
Summers are right here, and with them comes an countless thirst. We drink extra water than ordinary and chilly water feels virtually magical in the warmth.
Quick enjoyable truth: once you drink chilly water, it absorbs warmth out of your physique because it warms up, serving to decrease your core temperature barely. At the identical time, temperature sensors in your mouth and throat ship alerts to the mind, creating an instantaneous feeling of aid and freshness.
There are some ways to sit back water. But one of many easiest and most fascinating — is the clay pot, or matka.
How does that humble, curvy vessel hold water cool with out utilizing a single unit of electrical energy?
What Is a clay pot manufactured from?
A standard clay pot is constructed from pure earthen clay, normally soil wealthy in tremendous mineral particles like silica and alumina.
The clay, usually collected from riverbeds or alluvial soil, will be formed simply when moist. After shaping, it’s air-dried after which fired in a kiln, which hardens it.
Importantly, it’s left unglazed. This means the floor is just not sealed, and the pot stays barely porous — filled with microscopic holes invisible to the attention.
And these tiny pores are the important thing.
Everyday thriller
Look carefully at a clay pot on a scorching afternoon. Tiny droplets start to seem on its outer floor. The sides really feel barely damp to the contact. Yet the water inside stays noticeably cooler than the encompassing air.
Is the pot leaking? Is it absorbing moisture from the surface? Or is one thing else taking place completely?
The reply lies in one thing your physique already is aware of the way to do.
The science: Evaporation
Evaporation is the method by which a liquid adjustments into vapour with out boiling.
The microscopic pores in the clay permit small quantities of water to slowly seep to the outer floor of the pot. When this water comes into contact with heat air, it evaporates.
in schBut evaporation requires power. To flip into vapour, the water should take in warmth, and it takes that warmth from the water contained in the pot. As a outcome, the remaining water turns into cooler.
In easy phrases: when the water on the floor evaporates, it carries warmth away with it.
If the pot had been glazed (like ceramic plates), the pores could be sealed, no water would seep out, and cooling wouldn’t occur.
Why it really works higher in some locations
Clay pots work finest in scorching, dry climate. In humid air, evaporation slows down as a result of the air is already filled with moisture .That is why matkas really feel only in dry summer time warmth.
A sensible and sustainable design
The rounded form of the pot will increase its floor space, permitting extra evaporation. Air transferring round it helps the cooling course of. And it does all this with out electrical energy, chemical substances, or plastic. Long earlier than fridges, folks had been utilizing easy physics to stay cool.
In a world of machines and energy consumption, the clay pot stays a quiet reminder that typically, the neatest know-how is the best.
Fun information
Evaporative cooling isn’t distinctive to clay pots. It seems throughout us:
Dogs cool down by panting. When moisture from their tongue evaporates, it removes warmth from their physique.
Humans sweat for a similar purpose — evaporation carries warmth away from the pores and skin.
Desert coolers use water-soaked pads and airflow to cool rooms.
Published – March 28, 2026 03:39 pm IST
