And before some "genius" asks: What do trucks have to do with Potato Chips bags being mostly air. Packages of Potato Chips (along with your soda, cereal, meats etc.) are delivered to the stores by trucks. Products like Potato Chips are air-sealed, also the same reason why sometimes items like, movies, video games, video game consoles, plastic objects or glassware have bubble wrap on them. So that the movements of the truck doesn't disturb the contents inside.