How to build a hands-free Oreo dispenser

In today's edition of Gareth's Tips, Tools, and Shop Tales, our pal Gareth Branwyn reminds us of The Practical Engineer's classic "Hands-Free Oreo Dispenser" project. My chin would be sore from overuse. From the project description:

The idea started as a joke where I thought it would be funny if you could eat Oreos while working with dirty hands.

I started sketching and tried a couple of different ways and figured that it would be the nicest result if you could use your chin to dispense the Oreos. The shape of the oreo, actually most round cookies, makes it quite easy to stack them and push one out at a time.