punctual makeup mirror

Many women will forget the time when making up. This makeup mirror is combined with an hourglass to make a ring on the edge of the mirror. At the same time, the ring is divided into the upper half ring and the lower half ring with leaks. When all the sand in the upper half of the ring leaks to the lower half of the ring, it indicates that the woman has been in the past ten minutes. To reset the timing, you only need to turn the makeup mirror upside down.

(School workers set up slag, can't render sand, study hard to render...)