I'm also developing a further game idea based in the same setting as Human Upgrade Labs, but with a different, more focused playstyle.
Here are some potions I designed/painted for that. These are not meant to be consumed like some mana or hp potion, but are meant to serve as ingredients in crafting/upgrading.
I know it's not the smartest thing to make final versions of visual assets while anything in the game can change in super early stages, but hey, I wanted to paint these. I will end up using them for something else if things change along the way.