When to increase formula?

me

Hi all, I recently weaned my baby off breastmilk to formula (mostly, she still feeds one or twice on the boob) and she takes 120ml 5x a day. Near the end of the bottle she always tosses it and is content for hours afterwards so I assume the amount is good for now!

Just wondering how I will know when to start increasing the amount she has in one feed?

Thanks in advance xx