Brushing your teeth with an ordinary toothbrush only cleans the surface of your teeth, but the dirt between your teeth is difficult to clean. Cleaning teeth with dental floss can clean the dirt between teeth more thoroughly. However, it is not so convenient to floss after brushing your teeth. The designer installs the dental floss box at the bottom of the toothbrush. After the dental floss is used up, you can open the box and replace it with new dental floss, so that we can use dental floss more conveniently.