Since kulhars are unglazed, a hot drink such as coffee partially soaks into the interior wall of the kulhad-coffee in which it being serve.Coffee is a brewed drink prepared from roasted coffee beans, which are the seeds of berries from the Coffee plant. The genus Coffee is native to tropical Africa and Madagascar, the Comoros, Mauritius, and Réunion in the Indian Ocean. The plant was exported from Africa to countries around the world.