2. The thermos cup can be heated with hot water to expand and repair some slight deformation.
3. The principle of magnetized water is also applied to thermos bottles. Magnets are added to the bottom of the bottle and the cap to magnetize water. There is generally no way to repair it.
4. Try to fix the gasket of a screw in the depression with argon arc welding at most, and then hook the gap in the middle of the gasket with automotive sheet metal's method to pull out the depression, but there are usually more or less defects. You can buy a cup cover to solve the problem of beauty.
Different thermos cups have different heat preservation time.
Good thermos can keep warm for about 12 hours, poor thermos can only keep warm for about 1-2 hours, and ordinary thermos can keep warm for about 4-6 hours. When buying a thermos, there will be an introduction to explain the heat preservation time.
The quality of thermos cups in the market is mixed, so it is suggested to focus on the thermal insulation performance of the inner container structure, the sealing degree between the lid and the bottle body, and whether the material releases harmful substances.