You can start a fire using just about anything, but when you're in the middle of nowhere and don't have a lot of fire-starting supplies, a user at social news site Reddit notes that Doritos make an excellent fire-starting material.
All kind of chips work for that. Works as well as birch bark for starting a fire in a hurry.
If you think about it, its basically pure hydrocarbons (which burn) soaked in fat (which burns).
So while you may not always have vaseline and cotton balls around, chances are pretty good that you do have some form of tasty, oily, fire-friendly chips that should work in a pinch.