Abstract: A nail polish bottle with a color matching extension cap comprising: a nail polish bottle having a roof, a floor and at least one side wall extending therebetween, the bottle including an aperture, a neck extending from the bottle around the aperture thereof, the neck including a coupling device affixed thereto; and an extension cap having an upper region and a lower region, the upper region of the cap having an open end at its uppermost extent, the upper region including a colored section resembling a colored fingernail, the lower region including a coupling device and adapted to be releasably coupled to the neck of the bottle, a brush being formed in an elongated configuration and affixed within the lower region of the cap, the brush having a plurality of hairlike bristles extending therefrom, the brush extending through the aperture in the roof and neck.