Hmm, sorry my bad - i just assumed when it refilled the potion is also used up whatever herbs were needed to make it. I didn't realize it was just adding more alcohol to the potion. So if i use up all 3 potions/charges, does it still just 'refill' it or do I then need to actually use the herbs to recreate it?
I suppose this means under this system, I'm better off brewing one of each potion since it seems like under this system I don't really need to keep a huge supply of herbs handy.