I really enjoyed looking at some of these articles on a web site for consumers. They're all articles on shrinking packages at the grocery story! From 7-Up to Beer to crackers and even things like disposable razors!
The writers of this site (http://consumerist.com/taking-it-seriously/grocery-shrink-ray/) really reveal any and all they find!
You know how coffee always came in 1-pound cans? Well, now Folger's and Maxwell House have 13 ounce cans. Just doesn't sound as nice, does it? Starkist Tuna is another that has shrunk from 7 ounces to 5 ounces.
So check out their site. They've got other topics that will interest you just as much.