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In fact, after we use one cotton swab with only its one head, we may throw the whole stick away. Now this design changes it : there are two gaps beside each cotton-heads, so the dirty cotton-head can be broken off and the left can be put back for using next time. Whats more, after users use up all cotton-heads, all cotton-heads are thrown away, but the middle sticks are left, he can take these sticks to shop and exchange new cotton swabs. Without dirty heads, recovery and recycling sticks will become more easy and more low cost.
Xiaolong Lou Fan Yang Xiang Gao Linghan Liu