Pringles potato chips are made from rotten potatoes.
I used to work on a potato farm, and we sold trucks of rotten potatoes to the folks who make Pringles. They power wash out all of the rot and mash the good potato that's left. Then they form the mashed potatoes into the tasty goodness we know as Pringles.
I can't promise a PIC every day, or even every week, but I may throw out a story from my potato grading days every now and again.