comment: >
  
  Chip bags don't have air in them. They have nitrogen. It both helps prevent chips from getting crushed, and also from getting soggy. If air was used, the chips would be stale by the time you opened them.
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  People buying their chip bags by volume rather than by weight are completely missing the point >
  
  I compare chips by calories/price. >
  
  Sure. Or you might want to do something like minimizing cal/g while maximizing g/$ >
  
  I wouldn't mind spreading those cals/g. When I was a starving college student I would often get microwave popcorn packs because it's satiety. It had a load of calories for the price.