Thermos cups are a must-have item for every household, whether it is children going to school or we go to work and travel, we need to bring a thermos cup. Recently, CCTV has exposed a batch of unqualified thermos cups, which are harmful to health for long-term use.
Although there are many types of thermos cups on the market, we must pay attention when choosing. Let's teach you how to buy a thermos cup correctly, so let's take a look together.
First, the inner tank of the thermos cup is very important. We can turn on the flashlight to observe the inner tank, whether the inner tank says 304 or 316, in general, 304 is food grade and 316 is medical grade. If 304 is written on the inner tank of the thermos flask, it is a qualified thermos flask; If there is nothing written on the inner tank of the thermos or there are numbers such as 210 or 201, try not to buy it, because this thermos flask is unqualified.
Second, in addition to the inner tank, the lid of the thermos cup is also very important. Because we often use the lid to drink water, the material of the lid is crucial.
Under normal circumstances, the lid will be displayed when purchasing, which is made of PP material, suitable for food contact. If these are shown, it proves that this thermos flask is qualified.
Third, we need to check whether the thermos flask will leak. First pour water into the thermos cup, then tighten the lid, shake it a few times, and then shake the cup mouth down a few times to see if any water leaks out. If there is water leakage, it means that the insulation performance of this thermos cup is not good, it is generally bad and cannot be used.
Fourth, we can test the insulation performance of the thermos flask. After buying back the thermos flask, be sure to try the insulation performance. The method is to pour hot water, let it stand for six to eight hours, and then open the lid to see if the water is still hot. If the water is still warm, it means that the insulation performance of this thermos cup is very good; If the water has already cooled through, it means that the performance of the thermos cup is not good and should be replaced in time.
In addition, pay attention to the following points when using a thermos flask: hot milk, acidic fruit drinks, tea and Chinese medicine are not suitable for placing in a thermos flask.
Be sure to pay attention to the above points when buying and using a thermos flask, do you find it useful?
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