I now know where that saying came from. But rather than cry, I just let out an exasperated "fuuuuuuuuuuuck."
You see that dark spot? That's where my pumped milk spilled and started leaking through my cooler on the way home. That's what I get for cramming 2 milk bags and a freezer pack into a cooler designed to hold only a single bottle. *Sigh*