Personally I wouldn't touch that eggnog. not after the kinds of things I've seen mold growing and thriving on.
(a pot of saturated caustic soda solution for example..ended up having something whitish and furry growing over the top. Was damned surprised anything biological could survive that kind of environment)
Microbial life seems to find a way to survive some pretty nasty conditions, such as at the mouth of deep-sea vents spewing out superheated water hot enough to melt lead, lakes of sulfuric acid, lakes of arsenical god only knows what, but definitely a giant pit of toxic waste, containing sufficient arsenic to kill most organisms. Even some life that can survive hard vacuum.