DIRECT & GERM-FREE PUMP-TO-BAG SYSTEM: The Kiinde Breast Milk Storage System allows you to collect, store, prepare, and feed using a single disposable breast milk storage bag. You won’t need to worry about contaminating your breast milk supply when you can use the same milk storage pouch to feed your baby. The system eliminates the risk of spills when transferring milk and provides the convenience of no dirty bottles to wash.PUMP & NIPPLE ADAPTERS INCLUDED: We’ve included adapters that fit all major pump brands, allowing you to pump directly into Twist Pouches. Since babies can be particular about nipples, you can also use the adapters to connect nipples from different brands. Instead of flimsy zipper seals, Kiinde Twist Pouches use a sturdy twist top. Our pre-sterilized, BPA-free Twist Pouches provide the ultimate protection for your liquid gold: leak-proof, freezer-proof, and made with food grade materials.SAFE BOTTLE WARMER TECHNOLOGY: The included Kozii bottle warmer uses a low-temperature warming system that is specifically designed to preserve the delicate nutrients and proteins in breast milk. It quickly and safely thaws and warms breast milk, formula, and pureed food in any container — bags, bottles, glass, plastic, or stainless steel. Kozii can even thaw breast milk bags directly from the freezer, at a safe, low temperature!All components of system are BPA, PVC, latex, and phthalate freeThe Toughest PouchDual-material, composite construction Twist Pouches provide the ultimate protection for your liquid gold. Leak-proof, freezer-proof, and oops-I-dropped-it-proof.