If the thermos cup is not chosen well, it may turn hot water into toxic water. Once CCTV reported a piece of news about the unqualified quality of the thermos cup:

The staff of the Beijing Consumers Association purchased more than 50 different brands of thermos cups through various channels.

In the evaluation of these thermos cups, it was found that 19 kinds of thermos cups were unqualified products, and the unqualified rate was as high as 40%.

And the water stored in this unqualified thermos cup will become toxic water!

Hearing this news, you may not be able to hold your thermos cup.

In the autumn and winter, almost every child has a thermos cup, what kind of thermos cup is safe and reliable?

01 

What is the "poison water" in the thermos cup?

There was such a real case on the hot search:

Lao Chen, a resident of Chengdu, Sichuan province, bought a portable thermos cup that he originally thought was convenient to carry when he went out to drink water.

A few days later, when he was drinking tea, he drank a piece of paint that had fallen from the inner wall of the cup, and he didn't take it seriously.

After returning home, he also removed all the remaining paint blocks in the thermos cup and washed them off, thinking that there would be no debris in it in the future.

Soon after, Mr. Chen found himself groggy lately, with tightness in his chest and itching in his throat.

This was rushed to the hospital, the hospital test, found that the blood aluminum content exceeded the standard.

This makes him puzzled, in addition to drinking tea and playing cards every day, the rest did nothing, let alone contact with heavy metals.

With this question in mind, he was discharged from the hospital after a few days of treatment, probably spending hundreds of dollars, but there is not much aluminum in the blood, and it was found in a more timely manner.

After leaving the hospital, someone looked at the thermos cup in Chen's hand and said that he had seen reports on TV before that some bad businesses put a lot of heavy metal in the thermos cup to make the insulation effect better in order to publicize it, which was a gimmick to attract customers.

Lao Chen recalled that when he bought this thermos cup, he heard the salesman say that it has a good thermal insulation effect, whether it is hot water or ice water within 48 hours, it looks like it has just been poured into it.

The thermos cup was only 20 a few dollars, he always thought he picked up a big bargain, which was reminded, he hurriedly sent to a professional inspection agency, do not check do not know, a check startled!

The aluminum content in the coating of this thermos cup seriously exceeds the standard, and the content information of harmful substances is not marked on the product label. Long-term use of this thermos cup will lead to aluminum poisoning, causing damage to the human nervous system, skeletal system and other aspects.

Fortunately, the paint block on the thermos cup has been washed off by him, and he has not ingested too much heavy metal, otherwise the consequences will be unimaginable.

02

The harm of excessive heavy metals in thermos cups

For manufacturers of thermos cups, the high content of some heavy metals will enhance the insulation effect, which is simply a double kill, as long as they are not found, they can get high profits, many businesses are therefore desperate.

There are two types of thermos liner materials that meet food grade safety, they are 304 stainless steel and 316 stainless steel.

Stainless steel belongs to a kind of metal, and all metal materials will face a problem, that is, corrosion and rust.

Stainless steel does not rust because chromium or nickel is added to the iron during the production process, and these two metal elements combine with iron to form a thin, non-functional skin film.

This coating will firmly cover the surface of the metal, and this coating is actually an oxide film.

Its role is to prevent the oxidation reaction with oxygen when the steel surface is in contact with oxygen in the air, thus protecting the metal from the outside world.

China stipulates that in food-grade stainless steel, the nickel content in 304 stainless steel should be 8%-11%, the chromium content should be 18%, the nickel content in 316 stainless steel should be 10%-14%, and the chromium content should be 18%.

Although the toxicity of cadmium is low, long-term exposure to cadmium-containing items in life will add up.

After ingesting cadmium, the body's liver and kidneys will pay a great price for excreting this toxin, and once the amount of cadmium in the body exceeds the normal amount, the body will have serious reactions, such as dizziness, nausea, vomiting and diarrhea.

If left untreated, high concentrations of cadmium can lead to acute liver and kidney damage, hypocalcemia, diabetes and other diseases. Chromium is also a heavy metal in the thermos cup, as long as the thermos cup is opened, the chromium compounds contained in it will be in contact with the chromium compounds in the air, and the human body is very easy to gather in the human body once inhaled, which is easy to cause liver, lung and kidney dysfunction.

The extent of chromium poisoning depends on the type of chromium as well as the time and frequency of exposure.

We should try to avoid choosing those thermos cups with high chromium content, and be sure to see whether there is a label reminder on the cup before buying.

In addition, the human skin is most vulnerable to the impact of nickel, long-term contact with high nickel content items, such as nickel alloys, electronic products, pigments, dyes, etc., on the skin will produce irritation and allergic reactions, causing eczema, itching and other skin problems.

These are all the harm that the excessive heavy metal content of the thermos cup will cause to the human body.

03

You can't put everything in a thermos cup

Unlike a glass or a ceramic cup, a thermos cup does not contain embedded debris, and the complexity of the stainless steel inner liner is doomed to hold only water.

"People's Daily" has reported a news: Fuzhou girl soaked a red date in the thermos cup forgot to drink, ten days later when unscrew the bottle cap occurred "explosion", the cup cap bounced off the cup cap burst the right eye ball, the eyeball is full of blood.

A perfectly good thermos cup. Why would it explode? This is because jujube fermentation produces expansive gas, the insulation cup is strong, produces a large amount of gas, so that the pressure in the cup increases, resulting in the "gusher" phenomenon.

In addition, the thermos cup into the fat sea, soy milk and other substances are easy to occur dangerous!

The reporter found a thermos cup and poured warm water, but also found three effervescent tablets.

The effervescent tablets release a large amount of carbon dioxide gas when they meet water, to simulate the effect of red dates, or the gas produced after the fermentation of soy milk.

Put three effervescent tablets into a thermos cup with warm water, and just screw the lid on, you hear a "bang" sound, and then the lid is cracked open by gas.

After standing the cup for a few minutes, the reporter tried to unscrew the lid, but he could not unscrew it.

Dare not imagine, if such a gas-filled thermos cup is open to the face, it will bring what kind of danger.

In addition to the explosion at the physical level, some liquids placed in the thermos cup for a long time will also occur chemical reactions that we can't see:

1. Warm milk

Putting hot milk in a thermos cup will allow the microorganisms in the milk to multiply rapidly at the right temperature, leading to corruption and easy to cause diarrhea and abdominal pain.

In addition, milk is stored in a high-temperature environment for a long time, vitamins and other nutrients will be destroyed, and the acidic substances in milk will also react chemically with the inner wall of the thermos cup, affecting human health.

2. Tea

Tea contains a lot of tannic acid, theophylline, aromatic oil and a variety of vitamins, should only be brewed with about 80 ° C water.

If the tea is made in a thermos cup, the tea is easy to ferment under high temperature and constant temperature conditions, the vitamins will be destroyed in large quantities, the aromatic oil is volatile, the tannic acid and theophylline are leached in large quantities, which not only reduces the nutritional value of the tea, but also makes the tea juice odorless, the tea taste bitter, and the harmful substances increase.

3. Traditional Chinese Medicine

A large number of acidic substances are dissolved in the decocted Chinese medicine, which is easy to react with the chemical substances contained in the inner wall of the thermos cup and dissolve into the decoction, which has adverse effects on the human body.

04

How to choose a thermos cup for children?

• A look at the material of the inner liner is qualified, which directly determines whether the water to drink is safe and sanitary, which is crucial.

At present, there are two kinds of common liner materials on the market: 304 and 316. 304 stainless steel is a recognized food grade stainless steel, processing performance and corrosion resistance is relatively good.

316 stainless steel is a little better than 304 quality, is a medical grade stainless steel, more resistant, but also more expensive.

How to know whether the liner material is 304 or 316? Generally, there is a label on the bottom of the thermos cup or the outer packaging box, and the label will indicate the material and execution standards of the cup.

Some thermos cups also mark the bottom of the inner liner with a material mark.

• Second：look at the tightness

We have a little sister in the editorial department, before the thermos cup filled with a cup of white fungus soup, ready to take the company slowly enjoy.

But when she opened the bag at the company, she saw water stains from tremella soup everywhere, and found that her thermos cup would drip out if she shook it twice.

For active children, a poorly sealed cup is easy to spill hot water, which may harm the skin and wet clothes.

When we choose, we can choose this V-shaped straw mouth, which can better prevent leakage and choke compared with the direct drinking straw.

Or simply opt for a thermos with a safety lock that sits sideways in your bag without leaking.

• Three： look at the insulation

The insulation of the cup is closely related to the process of the lid and the inner liner.

Let's try to choose the kind of straw cover of the thermos cup and seamless liner, its thermal insulation performance will be much better than the other several.

Secondly, insulation and fall resistance have a great relationship. It is common for children to throw things at random, but the thermos cup is much broken, and the insulation will certainly be affected.

In order to reduce this kind of man-made damage, we can choose this kind of cup with anti-fall protection and anti-slip handle.

However, there is a point to remind everyone that it is good to want children to drink hot water, but the temperature of the water is best not to exceed 50 ° C, otherwise the child is very likely to be burned by the liquid splashing out of the pipe.

• Four： to see whether the cleaning is convenient

How much can the thermos cup hide dirt, look at this picture you will know!

You know, there is not only limescale in the mouth of the water cup, but also the food residue that is spit out when the child eats and drinks

Sometimes with hot milk and other drinks, it will be more dirty...

In order to facilitate cleaning, we can choose the kind of easy to disassemble, easy to clean the cover, it is best that each part can be disassembled, and it is not difficult to wash.

Since the "death cup" was exposed by CCTV, the topic of the quality of the cup has never been forgotten by everyone and has been hot.

As parents, we should sharpen our eyes when choosing a thermos cup.

Some thermos cups with unclear qualifications and exaggerated utility should be carefully screened and strictly checked.