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Four seasons ,no matter the weather is hot or cold,this cup case will always conform to your requirements. This cover can be used in different ways.When we feel the bottle is too hot,then we can put our hands out of the cover .when we feel cold ,we just can put hands into the cover,so both side of our hands can be warmed.which can provide best warmth in cold weather.
Zhejiang Sci-Tech University
Zhang/Cheng Ling`en/Wang Tuo/Jin Guangbo/Wang