What it is: A customizable lipstick case for your favorite shade of Rouge G de Guerlain Lipstick (sold separately).What it does: Featuring designs by jeweler Lorenz Bäumer, this majestic double-mirror case with legendary curve is now available in a number of styles so you can pick the one that bests suits your mood. It is adorned with faux leather and comes in bold, powerful colors to transform your lipstick into a work of art. Each case is unique and the design may differ.