Reading expiration dates just doesn't cut it for me. I have rancid milk mishaps far too often.

I propose that someone with a lot of smarts follow the pioneering effort put forth by tooth brush companies and their blue indicator bristles.

When my milk turns bad, I want the carton to tell me. It can turn blue, or maybe even red, or some alarming color that says "Hey man, don't drink me, I'm now vile poison."

Perhaps an additive could be placed in the milk that would turn the milk into cat litter the very split second it went from optimal freshness to vile poison rancid milk.

This would satisfy my disgust and disappointment for the very action of "going rancid" by letting my cat poop on it.

Perhaps a cap could be designed that would lock down when the milk went bad, prohibiting me in my morning stupor from pouring lumpy white poison on my Frosted Flakes.

Or maybe build a Cheese Factory (not to be mistaken with CheeseCAKE Factory) into the carton that would, with the power of bio-agricultural-technology, turn my rancid milk into Blue Cheese Salad Dressing.

Ultimately, as technology advances and nano technology is as common place as miniature spy cameras, I'd like to see my rancid milk break down into it's most basic components, then reassemble as turf for my lawn.