6. Metal Gear Calorie Mate
Calorie Mate is an energy supplement sold in Japan that comes in several forms, including a canned soft drink. It comes in different flavors as well, and the item was seen in Metal Gear Solid 3: Snake Eater as a consumable that fully restores Naked Snake's stamina.
It looks like a ration, we suppose, but the generic packaging sticks out like a sore thumb.