Jouviance - Restructiv Plump FX Kiss Lip Serum Plump up the volume of your lips with our Plump FX lip serum, which offers an instant volumizing effect, like a hyaluronic acid injection, for smoother, better hydrated, fuller lips. This serum smoothes, firms and contours lips, smoothing out vertical lines, wrinkles and fine lines for a more youthful, sculpted and plumped mouth.