* 0 Months+ * For Babies with Excessive Spit up, Fussiness & Gas * BPA Free * We"re the Natural Choice * Mimics Natural Flex, Feel & Movement of Mum"s Breast Tommee Tippee Closer to Nature bottles are only suitable for use with Tommee Tippee Closer to Nature nipples. Materials listing: Polypropylene, silicone, TPE. Set Contains: * 2 5fl oz /150 ml vented bottles with slow flow nipples * 1 9fl oz/260 ml vented bottle * 2 Medium flow nipples * 2 Spare valves Helps reduce the risk of baby ingesting air during feeding 1. Air has to vent into the bottle to prevent vacuum build-up and teat collapse 2. This bottle vents through a hole in the screw ring 3. Air bubbles travel down the venting tube and collect in the air space behind the milk With Closer to Nature Sensitive Tummy Feeding Bottles, switching between breast and bottle feeding becomes easier than ever before. We’ve designed the unique, easy-latch-on nipple shape with breastfeeding experts to mimic the natural flex, stretch and movement of mom’s breast. With a super-sensitive anti-colic valve you can enjoy baby’s intuitive, comfortable, relaxed feeding.