I was actually thinking about the IVAN roguelike when I suggested that. IVAN has a pretty neat way to deal with liquids and materials in general.
Every liquid has its own stats and abilities like in this game but they work in an intersting fashion and you can make hilarious edits with small changes.
For instance, you can make goblins bleed vomit, and if that vomit has a chance to make you vomit, you might vomit all over yourself or the goblin when spilled, which might have a high chance to make you both vomit uncontrollably on each other to death.
Another interesting thing you can do with that system is to make a monster bleed healing potion instead and heal it and you if you get splatted.
There are various way for liquids to work in IVAN.
-They can be bleed.
-They can be contained in a bottle.
-They can be vomited either when a character is sick, poisoned or voluntarily.
-Characters can sweat them when in combat or when doing other tiring activities.
-Some characters, like dogs, can drool them.
I think that’s all of the instances they can be found. Gasses and Solid Materials work similarly. Really interesting, IMO.