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Sometime, open the cap is very difficult. This product can help us to open the cap. It is a new shape of cap and looks like water drops. Put the forefinger on the concave, and put the thumb on the other side. Unscrew the cap as before. The concave can help us to exert. And don`t worry about our hands are wet or oily.
Shih Chien University
Taipei, Taiwan
CHANG-YI LI,
Shih Chien University
