Sign up for an Award
Participate with your entry in one of our professional or student awards.
Sign up for an awardLearn more:
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
As we all know, toothbrush has 3 months shelf life, but we always forget the time of using for it. The longer we use it, the easier we get oral disease.
In order to remind the user time of using, we put the countdown mark on the toothbrush handle-”Disappearing Red Dot”. When using a new toothbrush, we firstly tear off the protective film on it, after this step three red dots start to disappear gradually: with each month disappearing one dot. In this way to remind us time of using and we should replace the toothbrush and make sure its cleanness.
Dalian Nationalities University
Dalian, China
Ya Tang,
Dalian Nationalities University
Cong Tian,
Dalian Nationalities University
Dalian Nationalities University
Dalian, China