- they can refill automatically like energy... - very rarely a potion bottle appears just like health/mana wisps, collect to refill one bottle - from time to time creatures drop a bottle which automatically refills a bottle (but randomly, so we can't farm them). - many quests reward a free bottle which auto fills one bottle... - we can purchase to refill with gold / or play minigame without having to go to the "commons" of a map - right from backpack... - if mana is full and we collect more wisps they start to fill the bottles bit by bit - wooden/silver chest may contain one too, a potion bottle that refills one bottle... - in fishing treasure chests perhaps too
It's too much gold to refill, but that's not the problem, it's just minigames I find them too boring even though I follow the technique to refill them in a couple mins.