But is it possible that the amount of food Americans are buying is, in fact… shrinking? Well, yes. Soaring commodity and fuel prices are driving up costs for manufacturers; faced with a choice between raising prices (which consumers would surely notice) or quietly putting fewer ounces in the bag, carton or cup (which they generally don’t) manufacturers are choosing the latter. This month, Kellogg’s started shipping Apple Jacks, Cocoa Krispies, Corn Pops, Froot Loops and Honey Smacks containing an average of 2.4 fewer ounces per box.