"McDonald's hamburger patties in the United States are made with 100% USDA-inspected ground beef," Riley wrote. "Our hamburgers are cooked and prepared with salt, pepper and nothing else -- no preservatives, no fillers. Our hamburger buns are baked locally, are made from North American-grown wheat flour and include common government-approved ingredients designed to assure food quality and safety. ... According to Dr. Michael Doyle, Director, Center for Food Safety at the University of Georgia, 'From a scientific perspective, I can safely say that the way McDonald's hamburgers are freshly processed, no hamburger would look like this after one year unless it was tampered with or held frozen.'" (http://news.yahoo.com/s/yblog_upshot/20101012/bs_yblog_upshot/mcdonalds-happy-meal-resists-decomposition-for-six-months)
Now, I was on the side of McDonald's; my hypothesis was that in two weeks it would decompose, grow mold, smell, etc. Yet none of that happened. I just left mine out on the counter, untampered; those locally baked-buns are petrified, and that 100% USDA-inspected ground beef is like plastic. I don't know about Morgan Sperlock's hamburgers in jars that molded but mine did not. Notice that nothing in McDonald's statement covers the fries...the one I shattered showed that it probably isn't pure potato from Idaho.
At the conclusion of my project, I have to say I will miss my little Happy Meal. I'm not sure I want to throw it away just yet. Below are comparisons from the first day of the project and today's final pictures. Pictures 1, 4, and 5 are from Day 1; the rest are from Day 14.