Everything is carefully chosen for babies, because babies are weak in every aspect. Although the pacifier is small, the choice is to consider various aspects. Choose the pacifier for the baby, pay attention to the size of the hole. Nipple pass is varied, and different passes are related to the flow volume of milk. Small circular hole is slow flow, middle circular hole is medium flow, large circular hole is large flow, there is a cross hole, flow is the largest. Round-hole nipple is suitable for 1-3 months of infants, milk can automatically flow out, and less flow; Cross-hole nipple is suitable for more than 3 months of babies, according to the baby's sucking power to adjust the amount of milk, a larger flow.