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This is a zip-top can which without residual liquid after you drink the beverage off.
There will be some remains inside the can and in the groove on the edge of the seal cover because of the structure of the opening.
This displeasure is also insanitary. In this design, we added a depression on the opening on the seal cover and extend the
sideline of the opening to the edge of seal cover. In this way, you can drink off your beverage completely.