The best thing to do it grab a pack of bottles, add 2ml of flavoring to a bottle (and combination) and fill the rest with the base you pick up from the site. The ratios will be right on and you can do 1ml of this, and 1ml of something else, or anything else you can come up with. Some flavors we do use more flavoring in to get that extra kick right out of the mail (the smell you all love) but it is not needed as much.