Doctors recommend throwing out your toothbrush every three months and do not recommend using someone else's. In both cases, the problem lies in the bacteria that herds breed on the bristles. However, on the brush, which offers designer Chris Anderson to breed herds of microorganisms is difficult. In the stand of this gadget is supposed to place the source of ultraviolet radiation, which every time you put the brush on the stand will conduct a total disinfection. via yankodesign.com