every baby is different my 1st son only took 120ml every 2 1/2 to 3hrs till he was 11mths he did sleep thru from 9pm till 6am...but during day was like this

son #2 well he is on 180mls hasbeen for about 6 weeks he is 4 mths next tuesday he has 5 feed a day and sleeps 7pm till 5 or 6am

if she is wanting more offer her a small amount whatever min is with your brand but because you offer more wont guarantee longer between feeds or sleeping thru