Abstract: An apparatus for a baby bottle container may include a plug assembly. A plug assembly may include a wall forming an inner volume. A plug may extend from the wall and form a portion of the inner volume. The plug assembly may be capable of removable attachment to a baby bottle container. An apparatus for a baby bottle container may include a chamber assembly capable of removable attachment to the plug assembly. The chamber assembly may comprise a partition configured to receive a portion of the plug within the inner volume of the plug assembly. The chamber assembly may be axially slidable about the plug assembly to selectively engage the partition with the plug to form a seal.

Abstract: Baby-bottle attachment for holding dry formula separated from water in bottle has a bottom portion with internal bottle-mating threads that mate to a threaded top on a baby bottle. The attachment includes a partition having an aperture and a seal on its upper surface. The bottom portion has channels partially imbedded therein. An upper chamber has external threads that mate with a nipple. The upper chamber has a partially open bottom with an off-center aperture. A seal pad is adhered underneath the at least partially open bottom of the upper chamber. A top member has a depressible release button that extends from the end, and is attached to outer surface near the bottom of the upper chamber.