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There are two parts of the cup,with two bottlenecks and can be shared with another people at one time. It can effectively avoid embarrassment,prevent the bacteria in mouth cavity from spreading,and apparently,it is much healthier. A person can hold when using different drinks, two beings become one and saves a bottle and more convenient.Water bottle design inspiration comes from Tai Ji.Tai Ji represents movement, on behalf of a perennial movement. And the water is the source of life, want to, you need health water.