A beverage container system for babies through small children has a thermally insulated outer container which is sized to receive a standard baby bottle and hold it therein with a retainer securable to hold a standard baby bottle. A cap may be positioned over the baby bottle nipple system to protect the nipple. The retainer and standard baby bottle may be removed. An adapter may be thereupon attached to the outer container which can be used with other beverage accessories such as a sippy cup, straw spout and drink tube spout.
