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Disposable chopsticks are easily tangled up each other when many people use it. Then, they can't find theirs and they are trying to use new one. It makes unnecessary waste. So, put colors on chopsticks' tip. Priorly, colors make you sorting easy. But, same situations can occur when users who have same color gather in one place. For this reason, cut some furrows at chopsticks' tip. These furrows and colors name your chopsticks..
KOREA POLYTECHNIC UNIVERSITY
SUWON, South Korea