This standard neck silicone nipple is 100% BPA-free, phthalate-free, and PVC-free. It features a reinforced ring for added durability and a unique stripe design that ensures a steady, consistent milk flow. The anti-colic air valve reduces air ingestion during feeding, and the nipple is designed to be easy to combine with breastfeeding. It is heat-resistant up to 180°C for added safety and convenience. Size SS