Abstract: A bottle which allows for an additive to be held in a container within the receptacle of the bottle separately from the contents held in the receptacle of the bottle until the time for mixture desired by the user. The bottle having a receptacle and a mouth leading into the receptacle. The bottle having the container in the receptacle. The container being formed to hold a substance therein and release the substance into the receptacle when the container is pressed with at least a predetermined amount of pressure. The container having a first member and a second member overlapping at least a portion of the first member in a slideable engagement to define a cavity therein. The second member having an opening formed through the surface, which is sufficiently sized to allow for a discharge of a substance contained in the cavity to be discharged therethrough. A cover is formed on the second member closing the opening.