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Water is one of the most important natural resources that human beings live on. It is essential in everyday life.
With the development of times, environmental awareness has been deeply rooted among the people. Most of them prefer using their own cups or bottles to disposable ones. Using these cups or bottles will produce the problem that the covers may be twisted too tight to open. Sometimes hot water will generate suction after cooling off, which cause the same problem.
Nanjing University of Arts
Nanjing, China
Nanjing University of Arts
Nanjing, China