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.
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
When using tumbler, you usually spill the drinks inside of tumbler frequently.
There is a sliding type of button in the part of tumbler's cap.
It can be opened if you slide it. Also once you detach from it, it closes its cover automatically so there's no possibility of pouring contents so anyone can use it with convenience.
Hanseo university
Incheon, South Korea
song i kim,
Hanseo university
