You can kinda get different cocktail variants already, you just have to hope for the game to give you something other than a humanoid one, because there ARE other variants available in the cockvine seedling encounters, you just gotta work around the RNG to get the one you want, not to mention pay attention to the text given that describes it's look.
I say I want this so I can avoid RNG and your answer is "You can already get what you want with RNG." That made me giggle.
This. And using foxfire allows you to change an existing cocktail into a furry one with a vulpine penis.
This actually sounds like a reasonable idea.
I imagine that in universe there are other means of getting a cocktail thanordering one at a barattaching a parasite. And that people, in universe, would perhaps want to change its shape, if not a public expansion it could be a black market thing. So in the future having the dong designer be able to do this through an upgrade or something seems reasonable, lore wise in the very least.
But how feasible it would be to do code-wise I don't know.
I imagine it wouldn't be too difficult, I mean if you used the ones that are already in the game it'd be just changing whatever variable is referenced in the scenes/appearance to the choice you made of the ones available. There's probably more to it than that, but it /seems/ like that's all that'd be required.