Ease of use: adding a bottle opener to the can lid

To make canning easier, designer Ju-yeon Kim et al. added a lever opener to the can. Simply open the folded handle part by 180 degrees, grasp the end and lift it up by hand, and use the principle of the lever to pull a small opening.
Then the handle is folded into a T-shape, pulled out forcefully, and the can is fully opened.

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