I didn't say $1 per ounce of fo & I didn't say a 16 ounce bottle with 4 ounces of fo either. I said I used 1 ounce of FO in a 4 ounce bottle with the 91% alcohol. I have purchased room spray "bases" before that smelled & looked like pure what is called "denatured alcohol" if any water is in it, it is very little. The $1.00 was for the 91% alcohol. I did go back and add water to this we'll see how it turns out.