I don't wan't to be a negative nancy but to me it looks like that picture uses forced perspective to make that cola look much bigger than it is, you can tell by the angle of the hand holding it, the plant is actually angled up toward the camera not down to the floor so it just looks huge. That's just the impression I get from that, I've spent a considerable amount of time dealing with perspective in photography. Imagine the camera is your face and she is about to tickle your chin with the cola.