A Chai Wallah is someone who makes Chai.  A “wallah” is the doer of the task, such as Rickshaw Wallah or Lassi Wallah (a yogurt drink often flavoured with fresh mango).  The Chai Wallah generally makes his Chai to order, setting his battered old saucepan over a kerosene stove, ladling in generous amounts of sugar to the boiling milk and water, then the spices and tea and sometimes a slice of crushed fresh ginger.  This concoction is boiled for a few minutes and deftly strained into a jug and then into a small glass or a kullarh, a low-fired clay saucer.