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Paper cup , a kind of disposable dinnerware, is very cheap and convenience to people. But it will occupy some space in litter bag after using. For example ,at the end of a party, the litter bag might be full of paper cups. It still has a lot of space inside because pressing them is to tax our mind and strength.

We cut a dotted line under Unroll , and there is a coat of waterproofing paint on it to protect the paper. That’s why we can press the paper cups in a easy way after we use them, it even make up more space in the litter bag.


National Hsinchu University of Educ

National Hsinchu University of Educ
Hsinchu, Taiwan

Yu Yan Li,
National Hsinchu University of Educ