I thought to suggest, but do you think we can have a tally of the items or ingredients each one has? I'm especially worried about the items, since I'm afraid the item we might end up picking will have a different vibe from the potion color (I imagine moth wings to go with warmer colors, mermaid scale to go with pastel colors, wisp tears or crystals to go with coolor colors, etc.). Especially since not everyone has their pack yet, I'm sure there'll be cool items down the line once people start receiving theirs in mail.
Personally I don't think we should jump straight to using our thickeners for the items as well; we should probably reserve thickeners for the colors? If we're still wanting to drive the color somewhere else, that is. But that's just me maybe. ^^;