well CGD is 1 part powder and 2 parts water, so 5ml is the amount of power, plus 10ml of water is 15ml, why do you want to know the liquid amount, it makes no difference to how much powder i use a day
I think you confused people because ml is a liquid measure, so people assumed you were talking about the CGD when it has been mixed with water.
Ok, a 5ml measure of CGD powder weighs approx 2.5g. I am talking about the 2-part diet though, the ready-mixed may be of differing density.
There is 113g in 4oz - so using 2.5g per day would last you around 45 days - i.e. a month and a half.