This can wait until we've revamped potions, unless we get a burning desire.

Still unsure how this is going to work. The plan is to make it so that every time you put a potion in it, it increases the "dose" count by 1 and divides the effects evenly among those doses.

If you place a 5 minute water breathing, a 3 minute strength and a 3 minute jump potion in the bottle, it will give you a 1:40 water breathing, 1 minute strength, 1 minute jump potion 3 times, allowing you to stretch out your potions by diluting/mixing them, and also making it easier to carry them all at once.

However, it will be more convenient for players to make really really potent potions so that diluting them isn't as impactful on duration. Using the elsewhere flask should allow a player to conveniently prepare a laundry list of buffs for a well-planned adventure or combat scenario, allowing you to quickly buff up for the encounter without having a jillion potions on you.