An application brush for a cosmetic formula comprising: i) a base having a central axis and including a top surface that is perpendicular or substantially perpendicular to the central axis and a bottom that is spaced apart from the top surface along the central axis; and ii) a bundle of bristles that is mounted on the bottom of the base. Tips of bristles forming the bundle of bristles cooperate to define a virtual plane that is perpendicular or substantially perpendicular to the central axis, and the virtual plane has an oval shape.