Potion Sort

A water / liquid sort puzzle. Vials of height 4 hold stacks of coloured potion. Tap a source vial then tap a target to pour: the top run of one colour flows across only if the target is empty or its top potion matches and has room. Sort every colour into its own vial to win. 10 brews grow from 3 colours up to 8, with two spare vials to work in.