Combination potions

A Combination potion is a potion made by combining 2 4-dose potions with a Crystal flask. To do this, you need to have bought the appropriate potion recipe from the Meilyr herblore shop. There are a total of 20 recipes with prices scaling up to 1,000,000 gp to unlock. 7 of these recipes need to be unlocked with gp, aswell by finding the recipe while Dungeoneering.