Feed directly from Kiinde Twist Pouches, completely eliminating the need to transfer milk from bottles to bags and back again! After thawing and warming, just snap the pouch directly into the Squeeze natural feeding bottle, squeeze the air out of the pouch, and pop the Active Latch nipple on top! Active Latch nipples are designed to teach and reward deep, wide, natural latching. By requiring suction AND massaging of the nipple tip, they are designed to discourage "lazy latching", and to ease the transition between bottle and breast. Using Kiinde's Direct-Pump adapters, nipples from a wide variety of brands can be used to feed gas-free directly from Twist Pouches, eliminating the need to transfer to a bottle and create more dirty dishes. Included reusable nipple cases double as bottle covers. Bottle is recyclable, and BPA, PVC, and pthalate-free. For a complete transfer-free, hassle-free breastmilk collection, storage, preparation, and feeding system: DIRECT-PUMP into Kiinde Twist Pouches, recyclable breastmilk storage pouches with twist-locking caps. Using Kiinde Direct-Pump twist-locking adapters, Twist Pouches twist-lock onto pumps from all major brands, for leak-free, transfer-free pumping. STORE and organize pouches in the Kiinde Keeper breastmilk holder and organizer, and THAW and WARM quickly and safely using the Kiinde Kozii breastmilk warmer and bottle warmer with steam-free SAFEheat technology.