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In many occasions after we use the disposable cups, we always mix them with unused ones. Disposable cups do bring many convenience to our life. However if we cant distinguish those used ones from unused, theres no convenience then. So how can we differentiate them?
This design dog-ears the used disposable cups to help us distinguisch them from the unused ones.
Huazhong University of Science & Technology
Huazhong University of Science & Te
Jiaqi Liu Yunlin Zou Zhenfeng Mao Zhenqi Han