With A Plug At The Top: When you bend down or pick something up, breast milk will not leak from the top. Remove the plug, let air circulate, and breasts be more breathable. Storage: When breastfeeding milk shell is full, pour out the breast milk or collect it in a empty bottle, it is able to be cleaned and reused for many times. Reusable Design: Milk collected by breast milk shell can be fed to babies, because every drop of milk is precious to newborn babies and nursing mothers. Ergonomics Design: Suitable for bras of any size, will not affect daily styling. Humanized breast shell protects nipples from friction and prevents milk from flowing out. Application Places: Breast nipple shell can collect and prevent the leakage of breast milk, so that you will not feel burdened during travel or daily work. Help nursing mothers avoid the embarrassment of wet clothes.