Abstract: A bottle with internal mixer comprising a bottle, where the bottle is separated into an upper portion and a lower portion, where the upper portion receives a powdered drink substance and the lower portion receive a liquid; a separator between the upper portion and the lower portion, where the separator is divided into two pieces along a seam; a sliding button coupled to the separator, outside the bottle, where the sliding button separates the separator to create an opening at the seam; a lid fastened to a neck atop the bottle; a mixer attached below the lower portion of the bottle, where the mixer includes a fan to mix the powdered drink substance into the liquid thereby creating a homogenous mixture; and a motor attached to the mixer to power the fan.