Tommee Tippee Closer to Nature Bottle is intuitively designed for easier and more natural feeding. The unique, natural shaped nipple mimics the natural feel, flex and movement of breastfeeding, similar to mum’s own natural feeding action. The super-sensitive anti-colic, anti-gas valve helps reduce gas and colic when feeding. All features combined provide baby the most natural alternative to breast feeding and allows mum to successfully combine breast and bottle feeding.