Canned Palestinians.
Good answer, but it's a little known fact that canned palestinians only have a shelf life of two years - and that's with modern canning methods. Who knows how well they kept back then. What if they weren't heated long enough.
On the other hand, they would have been purchased from supermarkets in Egypt, and we know how long King Tut lasted (some parts are edible...). Wasn't there even a well preserved babe that Clinton had the hots for?