Is there a way to quickly identify whether the thermos cup is qualified? (one)

According to incomplete statistics, in 2013, the global per capita thermos cup was 0.11, and in 2022, the global per capita thermos cup was 0.44. From this data, it is not difficult to see that after 10 years, the global usage of thermos cups has increased by a full 4 times. In some developed countries and some countries that are used to using more thermos cups, this data is even higher. This also shows that the sales of thermos cups have grown tremendously in this decade.

Friends, take a look, do you have a thermos cup?Do many friends not only have thermos cups but also have many? While the fans of the editor's article account are increasing, more and more fans want to know how to quickly identify whether the vacuum flask is qualified. Today, the editor shares some simple methods, so that friends can quickly identify whether the thermos cup they purchased is a qualified product. Before I share it with you, I will make an environment setting first. It is best to identify the newly purchased thermos cups at home, because it will be more convenient to operate at home.

First of all, how to identify whether the thermos cup is insulated? After the friends get the newly purchased thermos cup, they should first open the water cup and take out the desiccant and other accessories in the liner, and then pour the boiled water into the cup. After tightening (covering tightly) the cup lid, let it stand for 1 minute, then touch the outer wall of the thermos cup with your hands, and find that the outer wall of the thermos cup is obviously hot, indicating that the thermos cup is not insulated. If the temperature of the outer wall does not change from the temperature before pouring hot water, it means that there is no problem with the heat preservation function of this water cup.

After the insulation test, we will start to test the sealing effect of the water cup. Put the thermos cup that is tightly screwed (covered tightly) and filled with water upside down. Please be sure to put it in a safe place, and do not cause the hot water to overflow due to an unstable upside down. After being upside down for 15 minutes, we check whether there is water overflow at the sealing position of the water cup. If there is no overflow, it means that the sealing effect of this water cup is qualified.

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