The Closer to Nature Tommee Tippee feeding bottle will be an indispensable tool for safe and convenient feeding of your baby. The Closer to Nature Anti-Colic Valve Nipple is made from soft silicone that stretches and flexes just like a mother's breast during nursing, making the transition from breastfeeding to bottle feeding and vice versa much easier. The super-sensitive anti-colic valve, designed for maximum bottle ventilation, ensures continuity of baby's feeding process and reduces the risk of intestinal colic. The shape of the bottle is very convenient - it is easy to hold for both mother and baby. Tommee Tippee Feeding Bottle Features: Easy to close and open Super sensitive anti-colic valve Silicone nipple designed to mimic mother's breast Unique bottle shape designed to fit little hands Variable flow nipple BPA free.