Each dose of the potion lasts for 6 minutes. Players get a notice in the chat box when the potion's effect is about to wear off (about 35 seconds before) and also when it wears off. 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. Once the potion has been partially drunk, no more doses can be added to it. After all six doses have been consumed, the flask will shatter and disappear.