Similar thing happened to me a few years ago.
I had changed the oil in my van and put the used oil in an old Welch's grape
juice plastic container, filled right to the top, and left it out in the garage.
My now ex-wife mistook the bottle for a new bottle of grape juice and took it
from the garage and put it in the fridge.
So not knowing this, I poured the oil into a glass and started to take a drink.
The second it touched my lips I realized what had happened.
You do not want to know what used motor oil tastes like, not to mention how
tough it is to get that taste out of your mouth.