Tart Addict, what are you making your 1/3 roller bottles with? I saw a recipe that said to use 50% Cyclomethicone, 48% Fractionated Coconut Oil & 1%-2% FO. I'm wondering how you'd do the math? Half of 1/3 would be 1/6th, but what would 1% of 1/3 be? & how would you measure by weight, on a scale, such a small amount? If anyone makes these, can you tell me what you do? Do you weigh the Cyc&FCO and do the FO in droplets? and how many? I once read somewhere that someone just does it by sight & fills 1/2 the bottle with one, the other 1/2 with the other & then adds fo, but how much fo? Thanks. I'm very interested in these roller bottle ideas for body scent. Thanks you