Product details of Tommee Tippee Feeding Bottle 340ml -12 oz Designed in conjunction with breastfeeding experts the revolutionary new tommee tippee Closer to Nature easi-vent teat mimics the natural flex movement and softness of a mum's breast to make switching between breast and bottle easier than ever before. The unique shape of the Closer to Nature easi-vent teat encourages your baby's natural feeding action so that switching between breast and bottle becomes second nature. The Closer to Nature bottles have been designed to be held in the most natural positions during feeding and can be held in 3 ways: cradled comfortably in the hand gripped in the same way as a traditional wide neck bottle and held from the base