This is an instant hot chocolate drink that my son brought to me from London. I tried a packet of it for the first time tonight; it makes a large mug-full with added hot water. The packet says it's less than 1% fat, only 40 calories per cup. I sure don't know what makes it so thick and rich (I probably don't want to know) but it's very good. I rarely buy diet drinks or food, but I'll definitely use all of this. Has anyone else tried it? I haven't seen it in the U.S.