Insulated cup
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Vacuum insulation: The sandwich of the thermos cup is generally pumped into a vacuum, due to the lack of heat transfer medium...
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Vacuum insulation: The sandwich of the thermos cup is generally pumped into a vacuum, due to the lack of heat transfer medium in the vacuum, which can greatly reduce the heat loss through conduction and convection. For example, the common stainless steel thermos cup, the vacuum layer between the inner and outer gallbladder can effectively block the heat transfer
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