The newer pepsi machines use buttons that are huge. They are in rows of four. If you press the first, third, second, and fourth buttons on the top row you can see information pop up on the screen. If you continue pressing the fourth button you can cycle through items. Some of the items shown are sales data (how many of each drink was sold) and other things like that. I haven't been able to find a way to get a free drink. I'm sure there are other functions that I don't know about. If anyone knows anything interesting about it, then comment.
Edited by peter_budo: Closing