If the child is dependent on breastfeeding, he needs within the first three months only a small regular neck feeding bottle and after the first trimester stage needs a standard size neck bottle of a larger size because of the total dependence on breastfeeding from mother's breast. This Bottle helps moms breastfeeding in the 1st 3 months as it's Slow flow and if you change the nipple to next flows it will be perfect for the baby from 3months+ and 6 months + as it's 240ml perfect for the baby at all stages