Sign up for an Award
Participate with your entry in one of our professional or student awards.
Sign up for an awardLearn more:
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
Friendship paper cup uses two different lip prints, red and blue, to separate two users who use the same cup. Thus, friends can still share the intimacy without the embarrassment of touching others slaver.
ZHEJIANG UNIVERSITY
HangZhou, China
ZHEJIANG UNIVERSITY
HangZhou, China
Danhua Sun
Ziwei Weng