In the 1920s, different products were also developed that showed the decade's preoccupation with shaping the mouth. Metal lip tracers, made in various sizes to satisfy the wishes of the wearer, were developed to ensure flawless lipstick application. Helena Rubinstein created a product called "Cupid's Bow," that billed itself as a "self-shaping lipstick that forms a perfect cupid's bow as you apply it." The development of the mirrored lipstick container in the 1920s also points to the importance of shaping the lips through the application of lipstick.