It is named after the tekeli, the narrow-necked pot (today often a kettle) whose steam cooks it: the rice flour sits on a cloth over the mouth of the pot until it turns fluffy and white.
Soft steamed cakes of rice flour with a coconut-and-jaggery filling, sold hot from small tea stalls in Guwahati from about 6 am and eaten with a cup of tea; most stalls have sold out by 9.