Potion flask

The Potion flask acts as a jumbo vial and can hold up to six doses of potion (including Juju potions and other untradeable potions, such as Overloads) rather than four in the traditional vial, and will shatter upon being emptied of its contents. Potion flasks are made using a glassblowing pipe with robust glass, yielding 100 Crafting experience. Making them requires 89 Crafting (boostable, but not assistable). After a sip of potion has been taken from the flask, it can't be sold in the Grand Exchange; however they can still be traded with other players. Flasks can be decanted into vials and vice versa through Teplin Macagan.

Empty potion flasks may be filled by using the flask on the normal potion or vice versa, provided that there are at least 6 doses of potions in vials. It is recommended that players do the former to prevent accidental consumption and additional clicking to evade the drink option.

Despite being created entirely of non-tradeable materials, the flask is tradeable, as are any six-dose flasks containing tradeable potions. Because the resources required to craft Robust glass are non-tradeable and have a maximum of 50 available to players daily (or more with the extra ores bonus from Shooting Star), Potion flasks will likely be in short supply as well as high in demand; it is Jagex's hope that players with the requirements to make them will find making them profitable. Mining the red sandstone gives 70 experience. If 50 flasks are made 5000 Crafting experience and 3500 mining experience is gained (3585 with full gold mining).

If filling the flasks before selling them, it is most efficient to withdraw 10 flasks and 15 4-dose potions, which would fill a full 50 flasks in five inventories. 75 4-dose potions are required to fill 50 flasks, with no doses left over. If using 3-dose potions then 18 vials and 9 flasks per inventory is the fastest way to fill, requiring 100 3-dose potions and 6 inventories.

Trivia

 * The Potion flask was announced in the 2012 February Behind the Scenes.