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.