Tommee Tippee Closer to Nature Glass Feeding Bottle 250 ml with Nipple to simulate the natural bending, stretching and Tommee Tippee Excellent breastfeeding movement like a mother's breast. Experts have added a flexible natural valve that responds quickly to milk flow. Made of soft silicone with a natural texture that makes it easy and slow-flowing. It characterized by total reassurance because of BPA-free.