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Blow air to get a pen / pen

Blow air to get a pen

The pen is a combination of ink and its packaging bag.The packaging bag is made from recycled fiber plants, easy recycling. The flat shape is easy to transport and carry.We can open the packaging and only use the ink. We can alo use it as a pen ,just blow air into the bag then will get a pen.it is very convenient and is also beneficial for saving materials and space.Children in the poor area who can not afford a pen can also use it to study and have fun in the using process.

University

Tianjin University of Commerce

Tianjin University of Commerce
Tianjin, China

University

Tianjin University of Commerce

Tianjin University of Commerce
Tianjin, China