Oh; the bottle content related 'problem' really isn't nearly as much of a problem as we'd think. It's really more of a copy/paste/overlap solution. This sort of thing is really exactly the kind of thing that I like to do.
Can you name all the kinds of content the bottles will have, as well as their appearances?
I don't believe that the individual graphics of each bottle's content will vary that incredibly much from bottle to bottle, save for a tiny modification for the extension of the size of it. I mean it's all mostly liquids, right? You're planning to have a Skulltula or group of insects in there at one point too, right?
Even so, all that needs to be done is to draw one style, then shift that one style around a lot, making backups, working on those copies, sliding them around, cropping them, moving them, overlapping and underlapping, etc. Really not a problem.
