These Breast Shells are designed to collect leaking breast milk during breastfeeding and pumping.Breastfeeding moms usually suffer from nipple soreness, engorgement or excessive milk leakage. With the help of breast milk collection shells, these common problems will be solved easily. Product Features:? Collect every drop of precious breast milk during the day; Protect sore nipples from friction; Help ease engorgement and protect cloth from moisture;?? The soft and skin-friendly silicone base provide a perfect fit ensuring a comfortable fit.??? The breast milk saver are made of food grade PP and silicone. They are BPA Free and eco-friendly to ensure breastmilk quality. ???? With build-in spout designed to allow pouring collected milk into storage container.????? They?re 100% reusable and easy to clean.Use Caution:? Please note the air vent must be placed upwards when placing in bra ? Please do not feed your baby with the milk which has been kept a long time in the breast shells since it can become contaminated.? The Breast Shells should be worn in the bras. It is not suggested to wear when you are bending over, sleeping or in side-lying position.? For someone with larger size breast, these may uncomfortable for use.