The number of condiment bottles in my fridge is...I don't wanna say "out of hand," but...well let's just say the number is high.  And when they're almost empty, trying to store them upside down literally creates a domino rally of frustration.  But the brilliant Alton Brown has a solution, and it's so simple!

Next time you buy eggs, just cut off the lit of the carton, and voila! Instant mustard caddy!