Being a mom is a full-time job, so you must always be prepared for the challenges that your parenthood brings to you. We know that and we are here to help you choose the right products for your little one. Meet our new and modern baby neck peristaltic nipple range designed to make the transition from breast to bottle feeding easier and to help fulfill all of your baby's nourishing needs. With utmost care and precision, we have created our silicon nipple for your baby s daily feeding time. It has a special valve that balances the pressure inside the baby bottle with the outer pressure and that lets air flow steadily into the bottle, not into your baby stomach minimizing infant colic. The peristaltic nipple encourage the natural movement of your baby's tongue, and ensure optimum development of baby's facial and jaw muscles.It has a high flexibility and can stretch up to 5 - 8 mm. Made of soft and durable material, these nipples are heat and tear resistant. Also, our product is made of 100% food-grade, non-toxic polypropylene and it`s BPA-free, soyou won't have to worry about Bisphenol-A in your baby's milk when you feed her/him from this bottle. It comes in 4 sizes covering all your baby's needs from birth until later: S (0-3 months), M (3-6 months), L (6 months+), X(12+months).