Abstract: A beverage bottle for mixing at least two liquids upon pouring is described. The bottle includes an outer container for holding a first liquid. The outer container includes a bottom, a circumferential wall, and an open spout. The bottle includes at least one inner container positioned within the outer container for holding a second liquid. The inner container includes a bottom, a circumferential wall, and an open spout. The bottle further includes a collar engaging the outer container and the inner container and holding the inner container in a fixed position relative to the outer container. The collar defines a first aperture in fluid communication with the inner container and a second aperture in fluid communication with the outer container.