"Can someone identify what is inside this 5 gallon jug of wine that is at least 25 years old? Found in a deceased grandparent’s basement."
A: "It’s a SCOBY (think kombucha) sometimes it happens, sometimes it’s bad, sometimes it’s fine. You more than likely have vinegar now."
Thanks Internet.
"... and the liquid will drop through the slit in the middle."
Let's keep it clean; this is not an AO site.