[Stainless steel cup is good]Can the stainless steel cup drink water? Can the stainless steel cup make tea?
Can the stainless steel cup drink water?
1. Stainless steel cups
Stainless steel cups are alloy products. Improper use will release heavy metal substances contained in them, which are harmful to health. In daily use, it is not a problem to use a stainless steel cup to hold ordinary water, but do not use acid drinks, such as juice, coffee, carbonated drinks, etc., because heavy metals are easily precipitated, so even if it is used to drink ordinary water, it is not safe. .
When cleaning stainless steel cups, do not use strong oxidizing soda, bleaching powder, etc. These substances are also prone to chemical reactions with stainless steel.
Summary of stainless steel cup: It is not a problem to hold ordinary water, but do not hold acidic beverages
Health index: ★★★☆☆
2. Ceramic mugs
There are two types of ceramic mugs.
The first type: Painted without color glaze, the inner wall is colorless;
Health index: ★★★★☆
Painted with no color glaze Ceramic cups, especially the inner wall to be colorless, are also the first choice for drinking water. Not only is the material safe, it can withstand high temperatures, but also has a relatively good thermal insulation effect. It is a good choice to drink hot water or tea.
The second type: colorful;
Health index: ★☆☆☆☆
Do you have beautiful colors and cute patterns on your water glasses? If so, replace it immediately. The colorful patterns on the ceramic cups are actually a kind of paint, which may hide safety hazards.
Especially when the inner wall is coated with glaze, when the cup is filled with boiling water or drinks with high acid and alkalinity, the toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid, and people drink it with chemical The liquid of the material will cause harm to the human body.
Ceramic mug summary: It is best to be painted with a colorless glaze.
Health Index: ★★★★☆ / ★☆☆☆☆
3. Glasses
In all materials In the cup, the glass is the healthiest. The glass does not contain organic chemicals during the firing process. When people drink water or other beverages from the glass, they do not have to worry about the chemicals being drunk into the stomach. Moreover, the glass surface is smooth and easy to clean, and bacteria and dirt are not easy to breed on the wall of the glass, so it is the healthiest and safest for people to drink water from a glass.
Glass Cup Summary: The Safest Drinking Water
Health Index: ★★★★★
4. Plastic Cups
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Plastic cups are also unwelcome. Because plasticizers are often added to plastics, which contain some toxic chemicals, when hot water or boiling water is filled in plastic cups, the toxic chemicals are easily diluted into the water.
In addition, the internal microstructure of plastic has many pores, which is easy to hide dirt, and it is easy to breed bacteria if it is not cleaned properly. Therefore, when purchasing plastic cups, be sure to choose water cups made of food-grade plastics that meet national standards.
Summary of plastic cups: hot water is prone to precipitation of toxic substances
Health index: ★★☆☆☆
Buy plastic cups and look for the numbers at the bottom
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Not all plastic cups are suitable as drinking cups. When purchasing, be sure to check whether there is a QS mark. At the same time, there is a small triangle symbol at the bottom of the cup, which is their ID card.
PET No. 1: heat-resistant to 65℃, cold-resistant to -20℃.
HDPE No. 2: Recycling is not recommended.
PVC No. 3: Best not to buy.
LDPE No. 4: heat resistance is not strong.
No. 5 PP: microwave lunch box, fresh-keeping box, high temperature resistance 120 ℃.
PS No. 6: It is heat and cold resistant, but not in the microwave.
No. 7 PC other categories: kettles, water cups, feeding bottles.
5. Enamel cups
The enamel cups are made by enameling at a high temperature of thousands of degrees Celsius, and do not contain harmful substances such as lead, so you can rest assured use.
Although the metal substance contained in the enamel cup is relatively stable, it may be dissolved in an acidic environment. Therefore, it is best not to use enamel cups to hold acidic drinks such as orange juice for a long time, otherwise ordinary water will contain metal substances. In addition, the surface of the enamel cup is easily damaged after being bumped, and harmful substances will be precipitated, which should be eliminated decisively.
Summary of enamel cups: relatively safe, but do not hold acidic drinks for a long time
Health Index: ★★★★☆
6. Disposable Paper cups
Disposable paper cups only look hygienic and convenient, but in fact, the product qualification rate cannot be judged, and whether it is clean and hygienic cannot be identified with the naked eye.
Some paper cup manufacturers add a lot of fluorescent whitening agents to make the cups look whiter. It is this fluorescent substance that can mutate cells and become a potential carcinogen once it enters the human body. And from the perspective of environmental protection, disposable paper cups should be used as little as possible.
Summary of disposable paper cups: many health hazards and not environmentally friendly
Health index: ☆☆☆☆☆
[Final summary]
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1. The safest is:
glass
ceramic mug painted without color glaze
2. The most unsafe:
Disposable paper cups
Plastic cups
Colorful ceramic cups;
3. Note:
Do not use stainless steel water cups, enamel water cups, coffee, orange juice and other acidic beverages.
Stainless steel cups for tea release the heavy metal chromium.
The reporter first found a brand new stainless steel water cup, brewed tea in it, covered the cup tightly, and stored it for 72 hours. 72 hours later, the reporter opened the stainless steel water cup and turned it over and found that the inner wall of the water cup was obviously corroded. Industry insiders have previously stated that tea contains a variety of chemical components, and a chemical reaction will occur when tea is brewed in a stainless steel water cup.
The stainless steel water cup contains chromium, which is a heavy metal. Because the protective film of the corroded stainless steel water cup is damaged, the chromium will be released, and if it is used continuously, it will cause harm to the human body. According to experts, chromium is a blue-white polyvalent metal element, the common ones are divalent chromium, trivalent chromium and hexavalent chromium. It is hard and brittle, and resistant to corrosion, so it is mostly used in stainless steel and other products.
If the human body consumes a large amount of trivalent chromium for a long time, it will affect the body’s antioxidant system, and it is easy to get some chronic oxidative diseases, such as diabetes and hypertension. In addition, due to the damage to the antioxidant system, it is prone to abnormal proliferation of diseases such as tumors. Compared with trivalent chromium, hexavalent chromium is more toxic, about 100 times that of trivalent chromium. Clinically, the harm of hexavalent chromium and its compounds to the human body is usually manifested in three aspects. One is to damage the skin, leading to dermatitis, pharyngitis, etc.; the other is to damage the respiratory system, causing pneumonia, bronchitis and other diseases; the third is to damage the digestive system, accidental ingestion or even long-term exposure to chromate, can easily cause gastritis, gastric ulcers and intestinal diseases ulcer. Excessive intake of hexavalent chromium can lead to kidney failure and even cancer in severe cases.
Experts remind that it is best not to use stainless steel cups to make tea, and not only that, it is best not to use stainless steel utensils for oil, salt, sauce and vinegar.
Experts remind: Do not use thermos cups to make tea.
Tea contains a lot of tannins, theophylline, aromatic oils and other aromatic substances and a variety of vitamins, which will be greatly reduced under high temperature and constant temperature, and the taste of the brewed tea is also too astringent, only suitable for use Brew in water around 80 degrees Celsius. If you use a thermos cup to make tea, soak the tea leaves in high-temperature, constant-temperature water for a long time, just like boiling them with warm fire. A large number of vitamins in tea are destroyed, aromatic oils are volatilized, tannins, and theophylline are leached in large quantities, which not only reduces the nutritional value of tea, but also makes tea juice without fragrance, tea tastes bitter, and harmful substances increase. It is assumed that drinking this tea for a long time will endanger health and lead to the occurrence of various diseases of the digestive, cardiovascular, nervous and hematopoietic systems.
How to identify the quality of stainless steel products?
1. Lemon test method
Pour lemon juice on the surface of stainless steel, if there are traces left, it means the quality is not good.
2. Magnetic test method
The chromium content of strong magnetic stainless steel does not meet the standard;
The chromium content of non-magnetic stainless steel does not meet the standard ;
The quality of the micro-magnetic stainless steel is up to standard.
So what kind of cups should we use to drink water?
What kind of cups are the healthiest to drink water with plastic prone to carcinogens
Plastic cups are cheap and not afraid of falling, and are very popular among office workers. It is best not to use plastic cups in the office. The first choice for drinking glasses should be glass. Don’t think that the glass is just transparent and beautiful. Among all the materials of the glass, the glass is the healthiest.
In addition to the precipitation of some chemical substances after being heated, plastic cups are also very easy to breed bacteria. Although the surface of the plastic looks smooth, there are actually many voids, which are easy to hide dirt. In the office, most people wash the cups with clean water, and the cups cannot be thoroughly cleaned and disinfected. Experts suggest that it is best to use stainless steel cups or glasses in the office, which should be cleaned every day, preferably with detergent and rinsed with hot water.
The cup is affected by static electricity such as computers and chassis, which will attract more dust, bacteria, and germs, which will affect your health for a long time. To this end, experts suggest that it is best to put a cover on the cup, and keep it away from computers and other electrical appliances. Usually, you should keep indoor air circulation, open windows for ventilation, and let the dust go with the wind.
The glass does not contain organic chemicals during the firing process. When people drink water or other beverages from the glass, they do not have to worry about the chemicals being drunk into the stomach, and the surface of the glass does not contain any organic chemicals. It is smooth and easy to clean, and bacteria and dirt are not easy to breed on the walls of the cup, so it is the healthiest and safest for people to drink water from a glass.
In addition, experts also advocate the use of enamel cups, because the enamel cups are made after thousands of degrees of high temperature enameling, do not contain harmful substances such as lead, and can be used with confidence.
The colorful ceramic cups are very pleasing, but in fact there are huge hidden dangers in those bright pigments, especially the inner wall is coated with glaze, when the cup is filled with boiling water or acid or alkaline When the beverage is high, the toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid, and people drink liquid with chemical substances, which will cause harm to the human body. Plasticizers are often added with plasticizers, which contain some toxic chemicals. When hot water or boiling water is used in plastic cups, toxic chemicals are easily diluted into water, and the internal microstructure of plastics has many pores. There is dirt hidden in it, and it is easy to breed bacteria if it is not cleaned properly. Therefore, experts remind that when purchasing plastic cups, be sure to choose water cups made of food-grade plastics that meet national standards.
