Weapon poison flask

A Weapon poison flask is a potion flask originally containing six doses of Weapon poison. It is created by using weapon poison on a potion flask.

Weapon Poison can be drunk, after which the player will gain the ability to poison an opponent. The poison effect lasts for 1 minute before another dose is drunk for the poisoning effect to continue.

The flask is made by blowing robust glass, requiring 89 Crafting and giving 100 experience. Red sandstone can be mined at Oo'glog and smelted using the Robust glass machine also located at Oo'glog.

To decant the potion into the flask, one must have at least 6 doses of weapon poison in their inventory, as well as one or more potion flasks. Using the flask on the potion will open a menu to decant them. The optimal inventory setup for decanting potions is 17 4-dose potions and 11 flasks.

Contrary to other potion flasks, all doses of the weapon poison are able to sell on the Grand Exchange. Once the potion has been partially used, no more doses can be added to it. After all six doses have been applied, the flask will shatter and disappear.

If the full, 6-dosed version of this potion is consumed, each dose would cost about coins.