The kumhar made the ghara for water, the chatti for curd, the tawa for cooking, the diva for Diwali, the tind for the Persian wheel and the ghara used in the funeral rite. Every one of those had a name and a shape that did not vary.
The clay came from the village pond, which is why the pond and the potter existed in the same relation as the field and the well.
Water kept in an unglazed clay pot cools by evaporation through the wall. That is the entire technology of drinking water in a Punjab summer before refrigeration, and it works.
Steel, plastic and the fridge ended it. The tind went with the Persian wheel, the diva went to candles and electric lights, and the ghara survives mainly as a percussion instrument in bhangra.
There are still potters in Punjab villages. Most make flower pots and diyas seasonally and have another income.
The potter made the household's water pots, the cooking vessels, the surahi, the chatti for setting curd and the diyas for Diwali, and was paid in grain at harvest.
The clay came from the village pond, which is why the pond and the potter were connected. Digging the clay deepened the pond and the pond gave the clay.
Steel, plastic and the refrigerator ended the trade in one generation. What is left is the diya at Diwali, the clay horse at a few melas, and the tandoor.