Buy Sisley Lip Gloss - Sisley Phyto Lip Star Extreme Shine Lip Gloss 4 Light Amythyst. How-to-Use: Used alone, it provides a glamorous, ultra-shiny effect and coats the lips in sheer color. For a more sophisticated result, use over Phyto-Crayon Contour des Levres Lipliner, or on top of lipstick to enhance its color and boost radiance.