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Screw bottle / Screw bottle

Screw bottle

Nonetheless of people without fingers or who have not enough strength to tighten the screws, anyone can easily tighten the screws due to my new mechanism which can be easily twisted and tighten without any hinderance or much of an effort


Korea Polytechnic University

Korea Polytechnic University
Siheung, South Korea

Minho Park,
Korea Polytechnic University