I have an evil stew that made the cook sick. Noone else has tried it yet, it's just sitting there emitting a noxious green vapour.

How do I pour it out/ditch it? My last stew just made everyone thirsty and it was empty after I'd left for a while. I don't know if they ate it or if it goes after a while, but I don't want them to eat this one while I'm away.