Drinking water is the second most important thing in life after eating, and the cup you drink is directly related to whether you do it right or not! If you use the wrong cup, it is equivalent to drinking poison!
1, stainless steel cup
Stainless steel cups are alloy products. Improper use will release the heavy metal substances contained in it, which is harmful to health.
In daily use, it is not a big problem to pour ordinary water into stainless steel cups, but don't put acidic drinks, such as juice, coffee and carbonated drinks. Because heavy metals are easy to precipitate, it is not safe to use ordinary water again.
When cleaning stainless steel cups, do not use strong oxidizing soda, bleaching powder, etc. These substances also easily react with stainless steel.
Stainless steel cup summary:
It's not a problem to put ordinary water, but don't put acidic drinks.
Health index: ★★★★☆☆
2. Ceramic cups
There are two kinds of ceramic cups.
The first type: painted with colorless glaze, the inner wall is colorless.
Ceramic cups coated with colorless glaze, especially the inner wall should be colorless, is also the first choice for drinking water. This material is not only safe and resistant to high temperature, but also has a good thermal insulation effect. Drinking hot water or tea is a good choice.
Health index: ★★★★★☆.
The second kind: colorful
Are there any beautiful colors and lovely patterns on your glass? If so, change it quickly. The colorful pattern on the ceramic cup is actually a kind of pigment, which may hide potential safety hazards.
In particular, the inner wall is glazed. When the cup is filled with boiled water or drinks with high pH, toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid. When people drink liquid containing chemical substances, it will do harm to human body.
Health index: ★ ☆ ☆ ☆.
Overview of ceramic cups:
It is best to dye with colorless glaze!
Health index: ★★★★★☆/? ★☆☆☆☆?
3. Glass
Among all the cups made of materials, the glass is the healthiest.
Glass contains no organic chemicals in the firing process. When people drink water or other drinks from glasses, they don't have to worry about chemicals being drunk into their stomachs. Moreover, the glass surface is smooth and easy to clean, and bacteria and dirt are not easy to breed on the glass wall, so it is the healthiest and safest for people to drink water from the glass.
Glass summary:
Drinking water is the safest!
Health index: ★★★★★★?
4. Plastic cups
Plastic cups are also an unpopular kind. Because plasticizers are often added to plastics, plastics contain some toxic chemicals. When boiling water is filled in plastic cups, toxic chemicals are easily diluted into water.
Moreover, there are many pores in the internal microstructure of plastic, which is easy to hide evil and shelter evil. If it is not cleaned, it is easy to breed bacteria. Therefore, when purchasing plastic cups, you must choose food-grade plastic cups that meet the national standards.
Plastic cup summary:
Hot water easily precipitates toxic substances!
Health index: ★★★★☆☆
Buy plastic cups and look for the numbers at the bottom.
Not all plastic cups are suitable for making water cups. When buying, be sure to look for the QS logo, and there is a small triangle symbol at the bottom of the cup, which is their ID card.
No.65438 +0 PET: heat-resistant 65℃, cold-resistant -20℃.
No.2 HDPE: It is not recommended to recycle.
No.3 PVC: It is best not to buy it.
No.4 LDPE: heat resistance is not strong.
No.5 PP: microwave lunch box, fresh-keeping box, high temperature resistance 120℃.
No.6 PS: heat and cold resistant, but it can't be put in the microwave oven.
7th PC other categories: kettle, water cup, milk bottle.
5. Enamel Cup
Enamel cup, which is made by glazing at a high temperature of thousands of degrees Celsius, does not contain harmful substances such as lead, so it can be safely used.
Although the metal substances contained in enamel cups are relatively stable, they may dissolve in 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 also contain metal substances.
In addition, the surface of enamel cup is easy to be damaged after bumping, and harmful substances will be precipitated, so it should be eliminated decisively.
Overview of enamel cups:
It's safer, but don't take acidic drinks for a long time!
Health index: ★★★★★☆.
6. Disposable paper cups
Disposable paper cups just look hygienic and convenient, but in fact the product qualification rate can't be judged. Whether it is clean or not is unrecognizable to the naked eye.
Some paper cup manufacturers add a lot of fluorescent brighteners to make the cups look whiter. It is this fluorescent substance that can mutate cells, and once it enters the human body, it will become a potential carcinogen. And from the perspective of environmental protection, disposable paper cups should be used as little as possible.
Summary of disposable paper cups:
There are many health risks and it is not environmentally friendly!
Health index: ☆ ☆ ☆?
Final summary
1, the safest thing is: glasses, ceramic cups coated with colorless glaze.
2, the most unsafe: disposable paper cups, plastic cups, colorful ceramic cups.
3. Note: Do not use stainless steel cups and enamel cups, and drink acidic drinks such as coffee and orange juice.