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After eating out, people usually throw away the disposable chopsticks then find another teethpick tool. That means people need two actions, "throw away" and "looking for" , to complete the process. After adding a hidden toothpick at the end of the disposable chopsticks , people just broke the tail off the chopsticks and take out the hidden toothpicks. It's more convenient and environmental friendly.
Chongqing University
Chongqing, China