Here's an exploit that works for any vending machine:
Requirements --> 1. A sledgehammer or crowbar.
2. A large backpack.
3. Good shoes or a fast bike. ( To gtfo )
Step one, choose your target. I personally like pepsi, but it works with any soda in the machine. Step two, swing as hard as you can, as fast as you can. The faster the better. Step three, load your backpack up and get the hell out of there.
Well, there you have it. The most effective exploit for a vending machine to date.