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"Three Months" is designed to remind people to replace their toothbrush in time. A circle on the toothbrush's handle is filled with a special ink that reacts to air after the protective film is removed: after 1 month, 1/3 of the circle turns blue, after two months two thirds are blue and, after three months, the whole circle is blue, indicating that you should replace your toothbrush.
Guangzhou Academy of Fine Arts
Guangzhou, China
Qichong WEI
Guangzhou Academy of Fine Arts