Someone mentioned chip bags in one of the previous comments: Yes the manufacturers often claim this "slack" fill protects the chips from turning into dust in transit, but I wonder this - "kettle" chips are notorious for filling only half the bag, yet their chips are some of the hardest on the market and are commonly found on completely opaque bags. At least many tortilla chip makers have clear bags so you can see the product (though many cleverly cut the window at the top of the fill level so you dont see the excess). Increasingly I also notice "99 cent store" name-brand bagged products being filled even less than their traditional grocery store counterparts. It's cheaper for a reason I guess.