Closer to Nature bottles are 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. Contains 3 - 9oz bottle with Slow Flow nipple. BPA and Phthalate free BPA Free Patented air venting system is scientifically tested to reduce air within milk Patented nipple mimics the natural flex, feel and movement of breastfeeding, with a super wide-neck design for easier latch on