The First Years Breastflow Slow Flow Nipple 2 pack (Stage 1, Slow Flow Nipple) is perfect for newborns and young infants, and fits all Breastflow bottles. Breastflow is the only feeding system that requires both suction and compression, just like breast feeding. The nipple is designed to mimic the breast so baby can latch on encouraging the same mouth and tongue position as breast feeding. This makes it great for combined breast and bottle feeding, making it ideal for mums who want to carry on breast feeding but also need to return to work.