The All-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 All-in-One keeps liquid warm or cold for up to seven 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. The All-In-One features a removable, BPA free, bottle insert; which is designed to offer parents 100% liquid visibility.