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At party,we always drink cans then we put it on the table. Trun around,we can not sure which one is us. In order to solve this problem, we can pull up the pull-tab of “My-cans” and rotate it to the letter you want as mark. The marked letter can be used to distinguish our cans. So we can distinguish our cans from a group of cans at the party quickly. By the way, the pull-tab of cans can be made by punching.