What It Is: Rouge G, Guerlain’s iconic jewel lipstick that can be customized and refilled, has been reinvented in an ultra-caring, 89% skincare-based formula, boasting a radiant golden case with a secret double mirror. Customizable and refillable, Rouge G cases come in an array of designs, showcasing Guerlain's know-how and commitment to eco-design.  Pair with the new Rouge G Customizable Lipstick Refill to design your complete lipstick. The new Rouge G cases are only compatible with the new-generation refills and vice versa.  What It Does: The weight of this jewel case has been reduced by 19% and its manufacturing process optimized, allowing a 30% reduction in CO2 emissions compared to the previous generation of Rouge G cases. How To Use: Customize your lipstick in 2 steps. For your first Rouge G purchase, choose a shade and a case to create your complete lipstick. For the following ones, refill the shade or change the case as you wish. Pair With: Rouge G Velvet Lipstick Refill Rouge G Satin Lipstick Refill Contour G Lip Pencil Kiss Kiss Bee Glow Lip Oil