Is it possible for Listerine to go bad sitting in its bottle? I don't see how it could, it's whole purpose is to kill germs and bad stuff, so wouldn't the inside of the bottle be like some oasis of cleanliness? Or is it possible for some germ invasion to overpower the Listerine and set up it's own fortress of gross?

What about crutons? Do crutons get stale? If so, wouldn't that just make them better crutons? I thought they were just flavored, stale bread.

DIscuss.