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It is hard to clean toothbrushes thoroughly, and the bristles dry out very slowly, so the bacteria grow and reproduce easily on the root of the bristles. Therefore, we design QD toothbrush. The part attached to the bristles is a bowl-shaped antibacterial rubber. After we brush our teeth, simply push out the rubber from behind, and then the bristles will stretch out. In this way, it is easy to clean the root of the bristles, and the bristles will dry out quickly. The bottom part is a suction cup. It can easily suck on a flat place in the bathroom, so the toothbrush can stand firmly, and can prevent bristles from touching other objects.