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The past health problems,the concept is only for the people's psychological and health,not solve the fundamental problem of health.Through the design,pull the ring on the side, pull up it, with the whole metal sheet is pulled up, so the beverage outflow place can not contact the contact with the outside world,solve the health problems fundamentally,at the same time when process the ring,the opening place need to set aside,then when pull the ring, so the ring will not be separated with the can body,play a role in environmental protection.