2 months baby both breast feeding and formula milk pls advise the size of feeding bottle needs to be changed after 3 months am currently using 125 ml but still my son feeling hungry

A. hello you can then move to the next size of nipple and make sure to o use a bpa free bottle like Babyhug which would be safe and also sterilise the bottle and based on the babies comfort you may decide to make changes in the nipple size of the baby bottle