This is a stupid question but I'm trying to keep better track of what my LO is taking in before we go to his 2 month check up next week.

If you make a 4 oz bottle, it ends up being more than 4 ounces of liquid because of the do you count it as 4 ounces or like 4.5? I ask because LO never really finishes a bottle so I'm saying he drank 3 ounces if there is 1 ounce left in the bottle, but if I add that extra it would be 3.5.

ETA to add - he is not drinking very much which is why if I add in all those extra 1/2 ounces it matters!