This is a slight tip, if not a guide, on how to decant doses 1 to 4 of any potion in flasks. I started out with Prayer flasks (doses 1 to 4, top of the picture), and three (4) dose Prayer potion vials, plus a (2) to make even flask doses at the end. You may use any dose of potion vial you want, I just used (4) and (2) as an example. Step one: Begin filling (6) flasks as you would normally, with your 1-4 dose flasks of the same potion type in your inventory. Use your empty flask on a Prayer potion vial, and then choose the number of (6) flasks you'd like to have. About 3-12 seconds later, depending on number of flasks, your inventory should look something like this if done correctly: Voila, you just decanted all those pesky (1-4) dose Overloads and Prayer renewals you were complaining about for 2 weeks. It does NOT save flasks that the potions were in, and it will not work on potion flasks doses 5 or 6, because they are not equal to what a regular potion vial can hold. You can only end up with (6) dose flasks, not less. If you do not have enough doses for a (6) dose flask, including a max of one (4) dose flask, you will not fill the empty flask to (6). I have not tried to use empty flasks on (1-4) dose flasks with no other potion vials in the inventory, so try it and see if it works. Though I doubt it will. This is a guide purely to help reduce bank slots used, and make it worth saving your random dose flasks instead of emptying/dropping/letting them rot. I hope it helped anyone reading :). If you find anymore info on this, feel free to post it and get your name on my thread, plus your info/correction. Credits: Wubstep Drop/Ren (me)