Avent Natural 2 Teats 2 Holes Slow Flow 1 Month + suit babies of 1 month and more.The large teat quite similar to the shape of a nipple allows a natural teat like during natural nursing, fostering the alternation natural nursing / baby bottle nursing for the baby.Its alveoli with a unique comfort, reinforce the softness and the suppleness of the teat, without crush. The nursing is more comfortable for the baby.Based on a double valve system, colic and discomfort of the baby are reduced. Indeed, thanks to the teat, the air penetrates in the baby bottle and not in the baby"s stomach. Your baby controls the milk flow, like in natural nursing cases.0% BPA.