The 3 in One Thermal Baby Bottle is not meant as a substitute for mothers" favorite baby bottle brands, but rather as an essential add on product. The 7 ounce 3 in One keeps liquid warm or cold for up to ten hours. The bottle is made of high quality stainless steel, insulated for maximum thermal capability. In addition to its thermal system, the bottle can easily be converted to a sip cup, and ultimately a drink bottle, by applying the company"s simple handle and spout accessories, giving the product an ultimate life of more than five years. During the course of infancy, toddlerhood and early primary years, most parents will use and ultimately discard from 3 4 plastic baby bottles, one or two sip cups and eventually their primary age drink bottle – but the 3 in One can be utilized during this entire phase, dramatically reducing plastic waste. In keeping with modern trends the bottle"s few plastic parts are free of BPA, PVC and Phthalates, and the product has been tested against a wide range of European and North American safety regulations. 7 ounce bottle comes with a single "slow flow wide neck teat."