This comes up occasionally - here’s one thread (Potion physreps: salve, liquid, oil, or infusion - #16 by LauraH). Honestly, I wouldn’t. You don’t know what people are allergic to and, if you forget about something when you store your kit away, you can end up with moldy potion gunk and decomposing cork all over your kit. There are a couple of exceptions (a big pot of herbal tea for Tranquil Nostrum, re-potted Snazaroo for Bronze Spider Balsam or Chiaroscuran Balsam)
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