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In daily life, traditional coasters are mostly used for preventing tables from being scalded, but cannot prevent people’s hands from being scalded.On the basis of traditional coasters, inspired by the design of springs, this kind of coaster is designed as spiral pattern. When putted flat, it’s only an ordinary coaster,when drinking water, people only need to pick up the coaster, and it can encircle the cup so as to prevent people from being scalded. In addition, because of the spiral design, this coaster can fit cups of different sizes,and be applied widely.