It will be all right. However, it is recommended to use boiling water (or add some edible detergent to scald it several times for high-temperature disinfection) before use. After the cup is sterilized, preheat (or pre-cool) it with boiling water (or cold water) for about 5-10 minutes. To make the heat preservation effect better, pay attention not to overfill the water in the thermos cup to prevent boiling water from overflowing when the cup lid is tightened and cause skin burns.
Will the thermos be kept warm?
The heat preservation effect of the thermos cup will gradually deteriorate over time. Vacuuming cannot achieve absolute vacuum, so a getter will be added to the cup to absorb the residual air, and the getter will have a “shelf life”, after the warranty is over, the natural heat preservation effect will deteriorate.’
Why is the thermos cup suddenly not insulated?
Poor sealing: If the water in the thermos cup is not hot, it is very likely that the seal is not good. After receiving the water with the thermos cup, check whether there is a gap in the cap or other places. If the cap is not tightly closed, It will also cause the water in the thermos cup to run out of heat quickly.
Air leakage from the cup: There may be a problem with the material of the cup itself. Some thermos cups have defects in the process. There may be holes the size of pinholes on the inner tank, which accelerates the heat transfer between the two layers of the cup wall, so the heat is quickly lost.
The interlayer of the thermos cup is filled with sand: Some merchants will put some sand in the interlayer of the thermos cup in order to fill it up. Such a thermos cup is still very heat-resistant when bought. After a long time, the sand will rub against the inner tank, which will easily lead to heat preservation. If the cup is rusted, the heat preservation effect is very poor.
It’s not a thermos cup: some “vacuum cups” come closer to hear no buzzing sound like a bee. Put the thermos cup on the ear, and there is no buzzing sound in the thermos cup, which means that this cup is not a thermos cup at all. , then such a cup is definitely not insulated.
Post time: Feb-28-2023