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This trumpet-like pen can stand on any horizontal surface, and after pressing the air out of the trumpet, you can have it adhere to the wall. While people dont use pens, its always a problem about where to put them. The highlight of this pen is that it wont accidently fall off a table or draw on your new shirt. And it can save the space if you put it on the wall.
Jia Rao Yanlin Li Weiyu Ruan Xiao Luo