Product details of Portable Manual Breastfeeding Pump Set-BPA Free International Breastmilk Association pointed out that sucking milk at night will help breast flow, improve the secretion of breast milk. Night sucking, it will not affect the baby's sleep! No need lean forward body, also can ensure that all the milk inflow the feeding bottle. Not only mothers sit more comfortable, but Secretion emulsion is more simple and convenient. 8.5cm silicone sucker, wide enough and more comfortable. Internal petal design, imitate the baby sucking milk, massage the breast, stimulate the breast to secrete. Easy to clean design, can be sterilized in boiling water. vacuum packaging to inhibits growth of bacteria, mold and yeast. We offer 60-refund and one year warranty, please do not hesitate to contact us any questions!