Coffee - (un)intuitively Visualized

From Nathan Yau comes this breakdown of the ingredients in whatever this East London coffee shop is selling.
WTF?
Seriously, WTF?
How are we supposed to know what these are? Maybe red is water, and green is an espresso shot?
I guess the whole thing is a bit of an a-la carte thing, but you'd hope that there would be something that sez. "This is a latte, that, is a macchiato" etc.
 Then again, maybe that is the point, and we're supposed to guess...