The Tommee Tippee Closer to Nature features a soft silicone teat that has an easy-latch-on shape designed to mimic the natural flex, stretch and movement of a mum’s breast. The bottle has an Easi-Vent valve which reduces air absorption and is designed to be held in the most natural position during feeding. BPA-free plastic. Available in 150ml, 260ml and 340ml sizes. The Closer to Nature teat provides slow, medium and fast options to match baby’s growth.