Decanting

Decanting is the process in which a player combines a partially full potions of the same kind to create a larger dosed potion. For example, decanting a 3-dose potion with a 2-dose potion yields one full potion (4-dose) and one partially full potion (1-dose).

When combing two potions, the player will receive a full dose potion (if the total doses is greater than four) or a partially full potion (if the total dosages is less than four), and either an empty vial or a partially full potion.

Occasionally it is required for potions to be in 2- or 3-doses, rather than 4:
 * Barbarian mix potions can only be made from 2-dose potions.
 * Using 2-dose super combat potions, rather than 4-dose, can reduce unnecessary monetary loss in the Wilderness.

Players can create 2-dose potions either by decanting two 1-dose potions. 3-dose potions can be created by decanting 2-dose potion and a 1-dose potion, or by making the potion from scratch. 3-dose potions cannot be created from 4-dose potions by the player alone, like 2-dose can be, without drinking a dose.

Zahur
Zahur in Nardah) can decant potions into 3-dose potions or 2-dose potions. Players can either talk with him or use his right-click Decant-X option. He will decant all the potions in the player's inventory, noted or unnoted, into the option that the player chooses, requiring empty vials - decanting into 2-dose potions will need more empty vials than decanting into 3-dose potions. The player can either supply the empty vials by carrying them in their inventory, noted or unnoted.