Volumizer
An alchemical flask that makes a second of whatever potion you pour into it
Single-use, and it does one thing: pour a potion in and you get two of it. The copy is real for a day and then it is nothing, and you cannot volumize a volumized potion to get four.
They came out of an alchemist’s potion belt in the keep, a pair of them, and one was spent almost at once: Koa had a cure moderate wounds to drink and drank the copy first, which put him back on his feet and left the original in the belt.
The party has been careful with what is left. They have twice been the reason a plan worked at all: a doubled meld-into-stone held back for getting into a sealed keep, and later a doubled draught of Ashanti’s making, stretched across the whole company before they went to meet Beltran in the street.
How many are left was never written down.