Pyrex Container update:
My hesitation bit me in the ass. Someone with more balls and less morals took it!
After giving it some thought, I've decided that the .1% chance that it was not my container is most likely. After all, it was empty. Why would I leave an empty container in the fridge? Usually after I eat I leave the container at my desk so I don't forget it.
Unless... Unless whoever took it out of the fridge emptied it before placing it on the counter...