very pretty!

Its naphtha and i use bottle emptier next to a blocked wall of 2 cell vertically. I wrote more than 1000 character explanations here first but steam wont let me post it. If you want details, add me.

I like your airlocks with crude oil and pretrolium. Do you have a good method on how to create them? I stopped using this kind of airlock because it is always such a mess.