A Vial is an item used in the Herblaw skill to create various potions. Players can fill vials by using them with a water source such as a sink or fountain, receiving a vial of water. Herbs can then be added to create unfinished potions. The best location to fill a vial with water is at the fountain near the west Falador bank.
Vials can be bought from Herblaw shops for 2 coins each and southern Karamja general stores for 3 coins each.
Vials already containing water can be bought from Kortan's or Jiminua's shops.
Vials can be made at level 33 Crafting by using a glassblowing pipe on molten glass. Doing so gives 35 experience.