If you’ve ever grabbed a bag of potato chips at the deli and were left disappointed by the pile of crumbs in your bag, your snack didn’t have enough nitrogen gas in it.

When packaging potato chips, the bag is inflated with a little bit of nitrogen gas.

There’s a dual purpose for this crunchy, salty balloon. The gas keeps the chips from being crushed before they make their way to your plate, and the nitrogen keeps them fresh. Oxygen causes food to oxidize (go stale) quickly, but nitrogen preserves the freshness.

More Info: en.wikipedia.org