Great for on the go Easy to use  Removes daily tea & coffee stains Contains the active ingredient Hydrogen Peroxide 2.1ml The TikTok sensation Teeth Whitening Pen is an easy-to-use pen for whitening on the go. It dispenses a small amount of gel, which contains the active whitening ingredient hydrogen peroxide, onto the teeth. Unlike other pens which use a white paint-like substance to cover stains, this formula actively dissolves stains leaving long-lasting results. How to Use:  Twist base of pen twenty times or until gel has been sufficiently dispensed onto the brush. Using the brush, paint your teeth with the whitening agent. Leave in place for five minutes. After five minutes rinse gel away with water. Use daily to maintain whitening effects.