It's not expired. Food just has those for laws, and crap.
Its f*cking salt water with sugar and shit in it.
The white sludge is likely just sugar that settled funny due to temperature changes, like KoolAid that was stirred by a gimp-armed 5 year old.
It's sealed, so I doubt it's moldy.
Shake one up, and chug it down.
If it's toxic, you'll just sweat it out anyways like the commercial, so who cares!