CAD would have been ideal, but pictures / video / measurements of the coolers in question may be somewhat helpful.
As a resident of the Atlanta area, it has been some time since I have seen the traditional coolers. Seems like the Freestyle are everywhere around town, yet those are clearly not the target of this competition.
You're right - this is not about Freestyle, or any vending machines. This is about the walk up coolers where you just open the door like you would a fridge and just grab a can/bottle off a shelf. There are a few photos on http://coolerhack.devpost.com if you scroll down.