The Tommee Tippee Closer to Nature 9 Oz. Feeding Bottle was designed in conjunction with midwives, breast feeding moms and babies to provide easier, more natural feeding. The bottle's soft, super wide nipple naturally flexes and stretches like a breast, and the natural shape lets babies latch on effortlessly, helping to ease the transition between breast and bottle and letting moms more successfully combine breast and bottle feeding. The intuitive bottle shape ensures a comfortable hold and breast feeding like closeness, while the ultrasensitive colic valve lets babies feed at their own pace with reduced risk of gas and colic. The included hygiene cap seals the nipple for travel.