Having lived in Chennai through most of my son's school going years, here s an added twist; I usually add the sugar to the milk before chilling it; when my son and his friends came home after playing in the hot sun, I just had to use a hand held blender to whip it up, add some decoction, then float a scoop of chocolate ice cream on top, sprinkled with chocolate powder for amazing cold coffee with ice cream.. in fact they used to call me to order/ check if I had enough to go around for the entire team before coming over, during the summer holidays!!