For the vial version, see Perfect juju agility potion.
Perfect juju agility flask detail

A perfect juju agility flask is a potion flask containing up to six doses of perfect juju agility potion. It is created by using a potion flask on perfect juju agility potion with at least six doses of it in your inventory. You can also talk to Teplin Macagan in Oo'glog to automatically fill up the flasks, even in noted form.

A dose of the potion is believed to last for one hour. While the potion is in effect, for each lap of the Hefin Agility Course, either the cathedral roof shortcut will be usable, or there will be a light creature on the roof that gives you a reward. When a player logs out, the timer is paused, restarting after they log back in.

After all six doses have been consumed, the flask will shatter and disappear. Only the original, six-dose potion is tradeable on the Grand Exchange. Once the potion has been partially drunk, no more doses can be added to it. However, if you wish to decant the flask into potions, you need at most four doses of potion left in the flask and an empty vial, decanting a flask into a vial will still make the flask shatter.

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