The device works by applying gentle vacuum suction to expand capillaries in the lips, increasing blood flow for a fuller appearance.It typically features a food-grade silicone mouthpiece designed to fit the curvature of your lips comfortably.Most models include adjustable suction levels, ranging from low to strong, allowing users to customize the treatment.The effects are temporary, and the device is designed to be a non-invasive, non-injectable alternative to cosmetic procedures.