Includes 3 bottles each with a reusable milk bag. 5oz bottle comes with slow flow (Y) nipples. 8oz bottles comes with fast flow (X) nipples. Baby-Led Feeding: Our innovative design allows your baby to naturally regulate the flow of milk, just like they do at the breast. When your baby pauses, the milk pauses too — supporting a healthy suck, swallow, and breathe pattern. Airless Technology: The Babaloo bottle features a patent-pending collapsible silicone milk bag that allows you to expels air and a nipple that prevents it from re-entering. The airless technology is designed to help reduce colic, gas, and spit-ups, help preserve nutrients and reduce milk oxidation. 360° Gravity-Free Feeding: Feed your baby in any position, anytime, anywhere. Our multidirectional design ensures milk is always available, promoting sensorimotor development and providing flexibility as your baby grows. Tailored for Little Hands: Allows your baby to hold and drink independently and in any position. *Slow flow (Y-cut) and fast flow (X-cut) nipples are interchangeable on the 5oz and 8oz bottles and are available for purchase separately.