MRE

If it's a Meal Ready to Eat (MRE) for the troops, it can't spoil, and it has to have a shelf life of two or three years. The average slice of pizza has trouble living up to those standards, but finally, the Army has found a way to make it happen.

A slice of pizza can last for three years! And if you're in the US Army that's not a bad thing.

The US Army might not be known for it's awesome culinary creations, but at the very least they'd like to make the food better for the troops.  And if you're willing to eat MREs (Meals, Ready-to-Eat) for three solid weeks, you can help make that happen.