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I think it's glass or porcelain.
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The first choice for drinking water should be a glass. Don't think that glasses are just transparent and beautiful, among all the materials, glasses are the healthiest. The glass does not contain organic chemicals in the firing process, when people drink water or other drinks with the glass, they do not have to worry about the chemicals being drunk into the stomach, and the glass surface is smooth, easy to clean, bacteria and dirt are not easy to breed on the wall of the glass, so people drink water from the glass is the healthiest and safest.
In addition, experts also advocate the use of enamel cups, because enamel cups are made after being enameled at a high temperature of thousands of degrees, and do not contain harmful substances such as lead, so they 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 acidic, alkaline drinks, the lead and other toxic heavy metal elements in these pigments are easy to dissolve in the liquid, and people drink the liquid with chemicals, which will cause harm to the human body. Plasticizers are often added to plastics, which contain some toxic chemicals, when hot water or boiling water is filled with plastic cups, toxic chemicals are easily diluted into the water, and the internal microstructure of plastics has many pores, which hide dirt, and it is easy to breed bacteria if it is not clean. Therefore, experts remind that when buying plastic cups, you must choose a water cup made of food-grade plastic that meets national standards.
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Glasses, stainless steel cups are good.
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Glasses, or stainless steel, or plastic, are very unhealthy.
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1. Stainless steel cup: no problem with water, not with drinks!
Safety Index:
Stainless steel cups are alloy products, usually used to hold ordinary water is not a big problem, but if it is used to hold acidic drinks, such as juice, coffee, carbonated drinks, etc., it will be easy to precipitate the heavy metal substances contained in the cup, so even if it is used to drink ordinary water, it is not safe.
It should also be noted that when cleaning stainless steel cups, you must not use strong oxidizing soda, bleaching powder, etc., these substances are also easy to react with stainless steel.
2. Disposable paper cups: unhealthy and not environmentally friendly!
Safety Index:
It looks 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.
In order to make the cup look whiter, some paper cup manufacturers add a large number of fluorescent brighteners, which may become potential carcinogenic factors once they enter the human body. And from the perspective of environmental protection, disposable paper cups should still be used less.
3. Plastic cups: choose food-grade plastics that meet the standards!
Safety Index:
Because plasticizers are often added to plastics, which contain some toxic chemicals, the toxic chemicals can be easily diluted into the water when hot or boiled water is filled with plastic cups.
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.
Therefore, when buying plastic cups, you must choose a water cup made of food-grade plastic that meets national standards. Look for the QS logo and a small triangle symbol at the bottom of the cup, which is their ID card.
4. Glass: healthy and safe!
Safety Index:
Of all the cups, glasses are the healthiest.
First of all, the glass does not contain organic chemicals during the firing process, so people don't have to worry about the chemicals being drunk into their stomachs when they drink water or other beverages from the glass.
Secondly, the surface of the glass is smooth and easy to clean, and bacteria and dirt are not easy to breed on the walls of the cup.
So drinking water from a glass is the healthiest and safest.
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1 From a security point of view, a glass may be the best choice. It basically does not exude harmful substances, and water at different temperatures can be filled. But the glass still has its drawbacks, which is that it is fragile.
2. Food-grade stainless steel cups, soaked in the standard test with a fairly strong acid for a long time, in which the seepage of chromium, manganese and other metals can also be less to ignore. We usually just use it to fill water, tea, coffee, juice, etc., which is much milder than the test conditions, and we don't have to worry about leaching harmful metals.
3. Underglaze colored ceramic cup, that is, the ceramic is colored first, then fired at high temperature, and finally the pigment is covered by the glaze, so that the heavy metals in the pigment are difficult to precipitate, which is relatively safe. On the contrary, the heavy metals in the pigment are easy to seep out of the glaze. It is better to choose a ceramic mug without a pigment pattern that is healthy.
4. Because of the low calcination temperature of the enamel cup, the porcelain formed is not stable enough, and when the enamel cup comes into contact with food (especially acidic food), harmful metals will seep out. Moreover, when the porcelain on the surface is damaged, the metal hidden under the porcelain is more likely to seep out. Therefore, this kind of cup is not recommended.
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Glass.
Compared with plastic cups, paper cups and other materials, glass cups are healthier drinking cups. It does not contain organic chemicals during the firing process, and people do not have to worry about chemicals entering the body when they use it to drink water or drink other beverages. Moreover, the glass surface is smooth and easy to clean, and it is not easy to hide bacteria and dirt.
Glasses are purchased
1. Select according to the material. Although glass cups are made of glass, the subdivision can divide the glass into many kinds, and most of the glass cups are made of high borosilicate glass.
2. Observe the thickness. High-quality glasses, the thickness of the bottle body is thicker, and the thickness of the bottom of the bottle is thicker than the bottle body, such glasses are generally not easy to break, and there is a certain heat-resistant effect.
3. Choose a double-layer one. When choosing a glass, we should choose a double-walled glass, because a double-walled glass not only has the effect of keeping warm, but also is not hot and easy to use.
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