Our purple whitening tooth strips contain lemon oil, hyaluronic acid. It soothes the mouth and restores white teeth, making you more confident. Its use method is very simple: 1. Take the product out of the packaging and carefully peel the back. 2. Place the product on the tooth and press gently to ensure that the product fits perfectly on the tooth surface. 3. Wait 30 minutes, remove, and then gargle. It also breaks down stubborn stains and gives you a brighter smile.