Lol, Dan. Usually just use simple sugar. Can put it in with the S.P. and everything stays clear. Others use juice of some kind. Will impart the juice flavor, but be aware the juice will dilute your abv. Concentrate juice will not dilute it as much as most of the water has been taken out of the juice. Rmember lemon will probably be the predominant flavor. Mite want to try a little sample and add your different flavor juice to make sure you like it. Arne.