I thought ethylene glycol is not that toxic to the human body.
Yikes. Methanol (i.e. “wood alcohol”) is nasty stuff. Blindness, and liver failure and/or death if you drink enough of the stuff (which isn’t that much maybe a shotglass or two, IIRC).
Whenever I have to leave my desk the first thing I do is to throw away any drink that I left out. You never know when a co-worker has left a little something extra in your coffee cup or water bottle.