Chocolate. This 110 year old tin of chocolate does not date from antiquity like the rest of the food on this list, but it still might be the world's oldest chocolate. There is evidence that chocolate (usually liquid) was made in ancient times, but not much actual chocolate candy has been left uneaten long enough to become antiquated. This little box comes from Scotland, and was made especially to commemorate the coronation day of King Edward VII in 1902.