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We often encounter such problems when brushing: the toothpaste foam In the mouth often flows downward along the toothbrush, and may flow in our hands, making our hands dirty. This design really solve this problem by adding a notch in the intermediate portion of the toothbrush so that it can stop the toothpaste foam continues to flow downward. The downward flow of toothpaste foam is relatively small and relatively lightweight, making it relatively easy to gather and stop the downward flow in the middle of the toothbrush, thus effectively protect our hands not be stained by foam.