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After clean-up the cup, there may have some water still inside it. What if we put it upside down then we can keep it clean more easily, because the reminded water will flow out automatically. The reusable cup handle is designed by general proportion cup-size in the market. The only way has to do is to wrap the circle part of cup handle into the prepared cup which you would like to use. It is not only easy to handle the cup but also in an artistic way when you put the cup in up-side down for dry in the air.
National Taiwan University of Science and Technology