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Bring Or Not / Umbrella

Bring Or Not
Bring Or Not

An umbrella that can remind you to bring it out when it’s raining outside.

The handle contains a material named CoCl2, which will change it color
according to the humidity.


Zhejiang University

Zhejiang University
Hangzhou, China


Zhejiang University

Zhejiang University
Hangzhou, China

Xin Xie Pinsi Yan Zhou Su Jiaxin Lu