This leave-on lip mask that helps nourish and replenish your lips overnight for smoother, more supple lips by morning. This leave-on lip mask that helps nourish and replenish your lips overnight for smoother, more supple lips by morning. Christina Zilber launched Jouer in 2008 to provide a fresh, editorial take on makeup. Renowned for their versatile formulas, clean ingredients, and award-winning packaging, Jouer’s products are designed to effortlessly enhance the wearer’s natural beauty.