It's simple and I think that a good example is indeed cereal. Have you ever noticed how friggin big a box of cereal is and how much smaller the actual bag within the box is? Companies are so concerned with making their product look way bigger than it is that the size of packaging has gone completely mad. Pretty soon, we'll be able to purchase a single piece of wrigley spearmint that comes in a package the size of a milk crate. I say, cram that cereal into the box like you cram your clothes into a suitcase!