Like pcbrook, I just use an empty FO bottle and cut the top off of it. I save the empty bottles of scents I know I'll make incense out of it, that way they're labeled with the scent already and there's no worries about scents combining. I put about 1.5 oz of FO and 1.5 oz DPG in the bottle, stir it with a few incense sticks and then pack them in there. The solution wicks up them and it works great.