In case anyone is wondering; It's absinthe. The bottle is filled with the ol' green fairy!

Considering the plants used to make it, someone like Einkel-who lives out in the sticks and uses wild herbs to make alcohol-would be about the only person in a setting like this who would produce something like that. Not because other people Couldn't make it...

But who besides a bunch of drunken hill-folk would toss a bunch of spices and medical herbs into a pot and try to turn them into booze? Especially ones you can only find growing in the wilds, and only together in a place with geography as messed-up as Swampmucks's.