Munchkin’s Latch bottle features a unique combination of ultra flexible nipple and one-way valve to help reduce gas and fussiness. Research shows that reducing gas and fussiness leads to better sleep for babies. This is why the Latch bottle is recommended by feeding and sleep experts. Experts also agree that a better latch eases the transition between breast and bottle, and back. That’s why the ultra flexible nipple pumps and moves just like the breast, stretching back to your baby’s soft palate for a correct latch. This easy-to-clean BPA-free Newborn Bottle Gift Set has all of the essentials you will need for your newborn baby. 12pc gift set includes: (2) 4oz LATCH Bottles with Stage 1 Nipples (slow flow), (2) 8oz LATCH Bottles with Stage 2 Nipples (medium flow), (1) LATCH Newborn Pacifier (0+ month), (1) LATCH Deluxe Bottle and Valve Brush, (2) LATCH Pump Adapters and (4) LATCH Sealing Discs.