In the past, the social environment was relatively simple, everyone didn't have much money, and their parents didn't have much time, so when the post-80s generation was young, they went to school by themselves and went home by themselves after school, which was no problem.
But now the situation is different, every morning and evening rush hour, in addition to the crowded streets in addition to people who go to and from work, there are a large number of parents who pick up and drop off their children, with the increase in competitive pressure, we see that many children's schoolbags are particularly heavy.
In addition to a few textbooks and various study utensils in the school bagMany primary school students still have a "standard" in their school bags, that is, thermos cupsTake a sip from time to time wherever you go, but you don't know that some thermos cups may be "life-threatening" thermos cups.
Ms. Lu's child has just entered primary school, and her child is not usually a keen athlete, so she bought a thermos cup in advance to fill some hot water for the child to bring to school, for fear that the child will be thirsty and have no water to drink.
However, within a month, something unexpected happened! One day, her child suddenly had abdominal pain and vomited badly during class, which frightened the teachers at that time.
Seeing this situation, the teacher quickly notified the parents and sent the child to the hospital as soon as possible, Ms. Lu also wondered when she saw the situation, the child is in good physical condition on weekdays, and this has never happened before, is it food poisoning?
But when he saw that the classmates who had eaten with his children were fine, she thought it shouldn't be the reason! Later, the results of the examination at the hospital came out, and the report showed that "the heavy metals in the body exceeded the standard".
This result made Ms. Lu feel very surprised at the time, because the child did not have this problem in the first half of the year, why was it only less than a month that the heavy metals were detected to exceed the standard? So where exactly do these heavy metals come from?
After thinking about it, she began to suspect the thermos cup she just bought last month, so she immediately took this thermos cup for testing, and the results were really as she guessed, this thermos cup was completely unqualified and a very inferior product!
In fact, the matter of "fatal thermos cup" was CCTV a few years ago, and the manufacturers of these cups took a fancy to the broad market of children's daily necessities, in order to make huge profitsThe use of inferior materials to produce thermos cups, the heavy metal content of the inner tank seriously exceeds the standard, and the corrosion resistance does not meet the standard.
According to the test data of CCTV, the hot water at too high temperature is poured into the thermos cup made of these inferior materials, which will have a chemical reaction with these heavy metals, and become poisonous water in a few seconds, seriously affecting the child's body and damaging the liver, kidneys and other organs.
If this kind of thermos cup is filled with water for children to drink for a long time, it will be easy for children with poor resistance to cause heavy metal poisoning, but many parents still do not know and buy it for their children, and parents are also reminded to be vigilant!
Previously, in fact, the staff of the Beijing Consumers Association purchased more than 50 different brands of thermos cups through various channels, and in the evaluation of these thermos cupsIt was found that there were 19 kinds of thermos cups that were substandard productsMainly because the product identification and liner material do not meet the national standards.
The experimenter put the 5% hydrochloric acid solution into the thermos cup, and after 24 hours, the content of heavy metal ions was detectedIt was found that there was a thermos cup worth 30 yuan, the inner wall was seriously corroded and even black, and the precipitation of heavy metals was also seriously exceeded.
So, some people may ask, what is the "poisonous water" in the thermos cup? Speaking of which, in fact, we have to mention the material of the thermos cup.
For the thermos cup, the liner material is the key to the quality of the thermos cup, and there are generally two kinds of thermos cup liner materials that meet the food-grade safety, which are 304 stainless steel and 316 stainless steel.
Some materials also look like stainless steel, but in fact, they cannot achieve the effect of food-grade rust resistance and corrosion resistance, so when using inferior thermos cups to hold hot water or other drinks, some heavy metal elements will be corroded and dissolved in water, resulting in the original clean water becoming "poisonous water".
After using an inferior thermos cup, our body will actually send us some danger signals, if there are symptoms such as nausea, vomiting, abdominal pain and diarrhea, and even bloody stools or pus and bloody stools will appear in longer and more serious cases.
In the nervous system, symptoms are mostly unexplained dizziness and headache, and in severe cases, symptoms such as confusion, general weakness, and convulsions may occur.
Generally speaking, stainless steel thermos cups are double-layer structures, and the two layers of stainless steel of the cup body and the inner tank are pumped into a vacuum environment after being combined by welding.
Then the cup body and the inner tank between the two layers of stainless steel between silver or copper, and the thermos cup is sealed with a stopcock, so that the heat will not be easily transferred, so the heat preservation effect can be achieved.
Long-term use of some unqualified thermos cups will bring greater harm to our body, so how can we buy a safe thermos cup?
The first is to look,At present, most of the thermos cups are made of stainless steel, and the cup body should comply with GB 48069-2016 "National Food Safety Standard Metal Materials and Products for Food Contact".
Generally speaking, the bottom of the qualified thermos cup liner has the mark of "304" or "316" stainless steel material, which is food-grade material, and the sealing cover of the thermos cup should use safe and heat-resistant PP material.
The second is smellingGenerally speaking, the qualified thermos cup does not smell a special smell when opening the lid, and there is no peculiar smell when filling the water in and then pouring it out, but those inferior products have a strange smell at the beginning, and they often disappear after a period of use.
There is also touching,The production of qualified thermos cups is relatively formal, and there are special quality inspectors and inspectors, so the surface polishing of the outer and inner tanks is uniform, without scratches, bumps or burrs, and the welding mouth should also be smooth.
In addition to that, everyone had better alsoTry the tightness, that is, pour boiling water and then tighten the lid of the cup, hold the cup body with your hand after 2 to 3 minutes, and feel that if there is no obvious heating, this means that the thermal insulation effect of the thermos cup is still good.
Then turn the cup upside down for 4 to 5 minutes to observe whether there is any leakage, if not, it means that the cup has a better sealing performance.
In general, as a daily necessities, for the sake of health, we should pay special attention to it when choosing a thermos cup.
Ten, hundreds of brands, here also hope everyoneBuy big brandsThe quality of the thermos cup is relatively more guaranteed.