Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
In our daily life,there are always song situation that we couldn't unscrew the caps of mineral water.
Now,change the normal caps which are made as circle to ellipse caps.The thumb finger and the index finger can better contact the caps.It aim to unscrew the caps of mineral water easily.
Nan Chang University
Nan Chang, China