Includes: 1 Nurser with nipple. Natural Shape Nipple eases transition from breast to bottle; Less air, less gas for healthier baby. Colors may vary. Leak-Proof Cap: Protects the nipple from leaking. Retainer Ring: Keeps nipple securely on Nurser. Natural Shape Silicone Nipple: Wide shape allows baby to latch on easily and helps ease transition from breast to bottle. Drop-Ins Pre-Formed Disposable Liner: Unique design provides quick and easy assembly. Contoured Nurser: Easy for mom and baby to hold. Best when used with Drop-Ins Pre-Formed Disposable Liners. Features: Natural Shape nipple's wide shape allows baby to latch on easily and helps ease transition from breast to bottle. Slow flow nipple is designed to satisfy younger babies' small appetites - perfect for newborns. Collapsible liner contracts like your breast to deliver liquid, not air, to baby's stomach, resulting in less gas and spitting up. Baby gets a fresh, pre-sterilized bottle every time. No more boiling or scrubbing bottles.