Includes: (2) 4oz LATCH Bottles with Stage 1 Nipples (slow flow), (1) LATCH 4oz Bottles with Stage 2 Nipple (medium flow), (3) Sealing Discs Better Latch: Nipple stretches like the breast helping baby latch correctly Like the breast: Pressure against the nipple releases milk as baby sucks, just like the breast Less colic: Nipple moves with baby to provide a continuous latch to help reduce the symptoms of colic (Anti-colic valve prevents air bubbles to reduce gas and fussiness) Anti-colic valve prevents air bubbles to reduce gas and fussiness Introducing the new Munchkin LATCH Bottle - designed to help you reach your breastfeeding goals. Experts agree that a better latch eases the transition between breast and bottle, and back. That's why our accordion nipple pumps and moves just like the breast, stretching back to your baby's soft palate for a correct latch. The bottle also features a one-piece, anti-colic valve - so no air travels through the breast milk, reducing the risk of colic.