Sources: All of the information stated in this article is based on reliable sources, and is detailed at the end of the article
Text: Xuanzang
Edited by Xuanzang
Preface
"Drink more hot water", this is probably what every Chinese has heard, whether it is a boy or a girl, the fate of Chinese is to drink hot water.
It's just that this drinking hot water is also a particular thing, but it's not how to drink it, especially in winter, when the weather is cold, and the hot water just poured out will become cold after a while, and the thermos cup will come in handy at this time.
In winter, the thermos cup has become a popular item, not to mention the many types, the price is also a variety of choices, but the thermos cup can not be bought indiscriminately, a wrong purchase is not "health", but "drinking poison".
Why is the thermos cup "toxic"?
In fact, there is nothing wrong with a thermos cup under normal circumstances, and the reason why a thermos cup is called a thermos cup is not a hot water cup. It does not have a heating function, but is able to maintain the temperature of the water. To put it simply, you can pour boiling water in the morning and burn your mouth at noon. Ice water is poured in the morning, and ice teeth are returned at noon.
Moreover, the thermos cup is in direct contact with the water, and this water is directly drunk into our mouths. This kind of product must be made more carefully, and food safety must be controlled.
But in fact, many unscrupulous businesses will do whatever it takes to make money, and even start in production.
According to the national standard, the material of stainless steel edible materials must be strictly standardized, and the amount of metal elements with toxins such as lead must be controlled.
But in fact, there will always be errors in the normal production process, and even some manufacturers will do whatever it takes for profit.
CCTV has done experiments and tried 12 thermos cups of different samples on the market, and it was found that all of these 12 have trace amounts of heavy metal precipitation, and if these heavy metals are drunk into the body, it will definitely have an impact on the body.
In addition, it is important to understand that the thermos cup is not "self-toxic", but is produced during use.
Some unqualified thermos cups are unable to hold overheated water or other things, not only will they be damaged, but the bigger reason is that this type of thermos cup will precipitate heavy metal substances when it comes into contact with overheated water.
Although the amount of precipitation of such substances has not reached the level of affecting health, these elements will continue to accumulate during use, and over time, they will produce toxins and even damage organs, which is absolutely not beneficial to the body.
Also, what to put in the thermos is also important.
These things can't be put
As mentioned above, a not-so-good quality thermos cup will precipitate trace amounts of heavy metals when it is filled with hot water, which sounds terrible, but in fact it is far from harming the body.
And now the materials used in the thermos cup are food-grade stainless steel, even if there will be exudation, it will not have adverse effects on the body for the time being, the most important thing is that it is just to hold hot water, it will never exude too many heavy metal elements, but if it is other substances, it may be.
Many people like to use a thermos cup to put some drinks, what coffee, milk tea, and even some people will put some soy milk, after all, this thermos cup can be loaded and maintain the temperature, it is indeed a good choice, but there is one thing that must not be put in, that is, acidic substances.
A common acidic drink is carbonated drinks.
Some hot women put the ice drink in the thermos cup for a convenient time, so that others can't see what it is, and it can keep it cold, and it is refreshing to drink a sip.
But what they didn't notice was that the most feared thing about the thermos cup was strong acid, although carbonated drinks could not reach the level of strong acid, but the acidity was not small, and long-term storage would not only corrode the inner wall of the cup.
It will also lead to the seepage of heavy metals, which is difficult to prevent. Instead of worrying about damage to the cup afterwards, it's better to leave these acidic drinks out in the first place.
How to choose a thermos cup
Of course, saying these does not mean that all thermos cups can not be used, most of the thermos cups on the market are very good, as long as you pay more attention when choosing, you can buy good and safe products.
The first thing to look at when choosing a thermos cup is to look at the appearance and the material outside.
The biggest function of the thermos cup is to keep warm, so the welding and splicing of the appearance must be tight, and there can be no tightness.
In addition, the outermost material is also very important, most of the thermos cups except for the inner tank is stainless steel, the rest of the place is either plastic or rubber.
Although this part is not large, it is in direct contact with the liquid in the cup, so its safety is also very important.
When choosing a thermos cup, it should be noted that the material of plastic or rubber must be PP grade.
This grade is food-grade silicone, which can be completely assured.
If you see that the material is PC, you should pay attention to it, not only can it not be used for a long time, but it can not be in contact with overheated liquids, which directly contradicts the role of the thermos cup, and naturally cannot be bought.
According to the national standards, the material of the thermos cup liner must be clearly marked, so the stainless steel material can be seen in the manual or cup.
It is generally divided into 201, 304 and 316 kinds, of which 304 stainless steel is food grade stainless steel, 316 stainless steel is better than 304, more stable and safer, and the average person uses 304 stainless steel, and 316 stainless steel is mostly used to make children's products.
As for 201 stainless steel, it is the least recommended to buy, this kind of material is industrial, and it is a little worse in terms of safety and stability.
Therefore, under normal circumstances, you can buy 304 stainless steel liners, and you don't have to worry about the manufacturer will be shoddy, the country has strict requirements in this regard, what material must be written, and things that do not meet the standards cannot be successfully marketed and sold.
In addition to being able to see the material, the most intuitive thing when buying a cup is to smell it when you get it in your hand, a good thermos cup has no taste, even if you get close to smell it, there is no rust smell when you put hot water.
But a bad cup has a strong and pungent smell as soon as it is taken out, and the taste of hot water for the first time is even more undrinkable, so such a cup naturally cannot be used.
Therefore, the quality of the cup can also be distinguished by the taste.
And then there is the most obvious one, and that is to look directly at the price.
It can't be said that the expensive one must be the best, but the cheap one in the thermos cup market is definitely not a good thing, after all, the cost is there, and it is impossible for the merchant not to make money.
Selling cheaply is only possible to work the cost, the cost is less, how can the material be good, so don't try to save money when you buy a thermos cup, spend more money to buy a good one, and use it with peace of mind and comfort.
Be kind to yourself
In fact, when we watch others shop, when we see others buying something cheaper, we will be complacent, there will be an old saying in our hearts to remind ourselves, that is, "good goods are not cheap"!
But when we buy things ourselves, we feel that we can pick the best and cheapest good things, isn't it a contradiction?
You can save money by buying things, but you have to choose the right place, such as buying socks, you can buy a cheap one, and if you wear it out, you can throw it away, and it won't affect anything.
It depends on where the item you buy is used.
Something like a thermos cup is basically used every day, and it is used for a lot of time, and it directly holds the water you drink.
Then you can't be too frugal when you buy this kind of item.
You have to do it in one step and buy some good ones.
After all, illness comes from the mouth, and choosing a good thermos cup is definitely not harmful to our body. And we also know that "cheap is not good".
If you fancy this thermos mug, the content of the introduction is very good, and the stainless steel grade is also very high, but its price is much lower than the price of other big brands on the market, then in this case, it is recommended to choose a big brand.
Author's point of view
In general, most of the quality of the thermos cup is still online, but it is not excluded that there is the possibility of indiscriminate filling, so we should also keep our eyes open when choosing, pick and choose, and finally always find the best and most suitable.
Sources of information:
1. Huashan Net: There are many hidden dangers of hot water turning into "poisonous water" inferior thermos cups
2. People's Daily Online: What is the principle of heat preservation of the thermos cup?
3. Baidu Encyclopedia: Thermos cup