A thermos cup is a container made of ceramic or stainless steel with a vacuum layer. There is a cover on the top of it, which is well sealed. Vacuum insulation layer can delay the heat dissipation of water and other liquids in it, thus achieving the purpose of insulation.

The thermos cup has many layers, and its interlayer is generally vacuum to prevent heat conduction! Then silver plating can prevent thermal radiation. Some cups have corks to prevent heat conduction.

Both inside and outside are made of stainless steel, refined by advanced vacuumizing technology, with elegant appearance, seamless inner container, good sealing and good thermal insulation performance. You can put ice cubes or hot drinks.

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Tips for choosing thermos cups:

First look at the appearance of the cup. Look at whether the surface polishing of the inner container and the outer container is uniform and consistent, and whether there are bumps and scratches;

Second, see whether the mouth welding is smooth and consistent, which is related to whether you feel comfortable when drinking water;

Third, look at the poor quality of plastic parts. It will not only affect the service life, but also affect the hygiene of drinking water;

Fourth, see if the internal seal is tight. Whether the plug and the cup match. Whether screwing in and screwing out is free and whether there is water leakage. Fill a glass of water, turn it upside down for four or five minutes or shake it hard to verify whether it leaks.