Vacuum insulation cup is made of stainless steel and vacuum layer made of water containers, the top has a lid, sealed, airtight, vacuum insulation layer can be installed in the interior of the water and other liquids to delay cooling, in order to achieve the purpose of insulation. Thermos is from the development of vacuum flask, the principle of insulation and thermos as, but people in order to facilitate the bottle made cup. There are three ways of heat transmission: radiation, convection and transmission. The silver cup in the mug can reflect the radiant water, and the vacuum of the cup and the cup can block the heat transfer, while the bottle which is not easy to transfer heat can prevent the hot convection.
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