I talked to my doc about this too, as well as a good friend of mine, and they both told me that you count the total. For example, I make a 6oz bottle, but with the formula in it, there is 7 oz of stuff in the bottle. Yes, there is only 6 oz of water in it, but even milk isn't only water, it has other stuff that displaces the water.
ALSO, if you were to make up a big batch of formula in a juice container for the day, you would fill the bottle up to the 6 oz line and think nothing of it, right? It's just with making it fresh you see the difference and realize that there is one.
So, for this reason, I just use the larger amount and don't worry about it.
HTH
Beth :wink: