Yotuel Intensive Whitening Pen. This tool is ideal for keeping your teeth white and clean wherever you go. Forget about worries concerning their color. With the whitening pencil Yotuel, you can remove minor stains on your teeth caused by drinks or food. It is so easy to use, fits in una bag, and applies with the same ease as a lipstick. The product has been designed by dentists and is made from ingredients that maintain the integrity and brightness of your teeth.|| Twist the pencil cylinder until the gel reaches the applicator. Apply a thin layer of gel to your teeth. Allow the gel to work for 15 minutes, without rinsing. Do not eat, drink, or smoke while using the gel. Repeat the application as needed.