Some thermos cups are not made of 304 stainless steel, but of high manganese and low nickel.
The corrosion resistance of this stainless steel is lower than that of 304 stainless steel.
From the news, we can often see that the heavy metals in some thermos cups are seriously exceeding the standard, which is very unsafe. If children often drink water from such cups, their health will also be greatly threatened.
What are the hazards of unqualified thermos cups?
Nickel, chromium and manganese are indispensable components of stainless steel, and inferior thermos cups with substandard nickel, chromium and manganese are easy to corrode at high temperature, and chemical elements are easy to enter water, thus causing harm to human body.
The worst may put children at risk of cancer and Parkinson's disease.
Therefore, when we buy thermos cups for our children, we must cheer up and carefully screen them.
First, how to buy a thermos cup?
0 1 sealing performance
Unscrew the lid of the cup to see if the lid is completely consistent with the cup body, then add boiling water to the cup and turn the cup upside down for two to three minutes to see if there will be water leakage. A good quality thermos will not leak.
From a sensory point of view.
Most qualified thermos cups feel strong and comfortable, while inferior thermos cups are thin and brittle because of their simple manufacture.
Smell the taste
Qualified thermos cups are made of food-grade materials, with little smell and almost no smell after leaving the factory. If you open the bottle cap and smell a pungent smell, it means that the material is inferior, and such a thermos cup can't be bought even if it is cheap.
Look at the price
Don't be greedy and cheap, choose 10 and 20 thermos cups. It is recommended to buy famous brands of thermos cups from regular supermarkets.
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Second, how do you know that the thermos cup is unqualified?
0 1 magnet
Prepare a small magnet and stick it on the cup body of the thermos cup. If there is a strong attraction with the cup body, it means that the cup is not really stainless steel, and the real stainless steel is very weak in magnetism.
Use lemon juice
Drop lemon juice on the surface (wall, lid and outside) of the thermos cup, and dry it after ten minutes. If obvious marks are left, it means that the quality of stainless steel products is poor and easy to be corroded.
Third, how to maintain the thermos cup
Be sure to clean and disinfect 0 1 before use.
It is safer to disinfect with boiling water or neutral detergent before use. It is better to preheat with boiling water for heat preservation.
Avoid knocking and collision in use.
Bumping is easy to cause damage or deformation of the cup body, and the welded part is no longer firm, which destroys the insulation effect and shortens the service life of the thermos cup.
The thermos can't hold everything.
In the process of use, the inner container should avoid contact with acid and alkali corrosive liquids, and dry ice and carbonated drinks are not allowed in the thermos cup. It is not suitable to hold milk, soybean milk, fruit juice, tea, traditional Chinese medicine and other liquids for a long time.
Clean regularly and pay attention to hygiene.
Drink alcohol as soon as possible, pay attention to cleanliness, and prevent evil spirits from being hidden and tolerated.