The material, price, thermal insulation performance, touch feel and working principle of stainless steel vacuum insulated cups and ordinary thermos are quite different.
Different materials: Ordinary thermos cups have various choices of materials, such as ceramic, stainless steel, plastic, purple sand and glass. The stainless steel vacuum insulated cups are cups composed of stainless steel as raw material and a vacuum layer. The vacuum insulation layer can delay the heat dissipation of liquids such as water installed inside, so as to achieve thermal insulation.
Different prices: The ordinary vacuum flasks sold on the market only have the effect of heat insulation. After the hot water is injected, the heat preservation time is about two to three hours. The price of this ordinary vacuum flask is far from that of stainless steel vacuum insulated cups. When purchasing, you should carefully screen the merchants of thermos cups, and do not buy them casually in informal stores. The safety and thermal performance of this relatively cheap thermos cup cannot be guaranteed.
Different thermal insulation properties: Stainless steel vacuum insulated cups have the characteristics of cold and heat preservation, and the vacuum cup with high vacuum rate can keep warm for 10 hours. The ordinary thermal insulation cup has poor thermal insulation performance, and the heat dissipation is stronger than that of the vacuum cup, and the insulation time is usually only two to three hours.
Different touch feeling: Pour boiling water into the cup in one minute, and then touch the outer body of the cup to make a difference. The hot one is not a stainless steel vacuum insulated cup, it is only an ordinary vacuum flask, and the one that is not hot is a stainless steel vacuum insulated cup. Stainless steel vacuum insulated cups can generally keep warm for more than 6 hours, and those with a high vacuum rate can reach about 10 hours.
The working principle is different: The thermos cup is developed from the thermos bottle. The insulation principle is the same as that of the thermos, but people make the bottle into a cup for convenience. The silver cup in the thermos cup can reflect the radiation of hot water, the vacuum of the cup and the cup body can block the transfer of heat, and the bottle that is not easy to transfer heat can prevent heat convection. Stainless steel vacuum insulated cups are generally water containers made of stainless steel plus a vacuum layer. The air in the interlayer of the shell is extracted to achieve the effect of vacuum insulation.
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