Healthy drinking water is not only about the quality of the water, but also about the container that holds it.
The water quality is good, the cup is not good, and it is equally unsafe.
There are 4 kinds of cups that are very harmful, and they will become "poisonous water" if they are filled with hot water, so I advise you not to use them, and throw them away quickly if you have them at home.
Three plastic-free cups
Plastic cups are the most widely used and the most harmful, and there are many plastic cups on the market that are three-no products, which have been bought in a large shopping mall.
When these cups come into contact with hot water, they release harmful substances and are of poor quality.
When buying a plastic cup, pay attention to the 7 numbers in the triangle at the bottom of the plastic cup, each number represents a material.
For example, the No. 1 PET logo, which means that it is disposable and thrown away after drinking, and the No. 3 PVC logo, which must not be filled with hot water, and the No. 4 PE logo, which cannot be filled with hot water, nor can it be heated in the microwave, and the No. 6 PS, which can not be used.
In general, the numbers 5, 7, and the identification Tritan, PP, and PPSU materials are safe, and the numbers 1, 2, 3, 4, and 6 should not be selected.
And if there is no logo on the bottom of the cup, don't choose.
glass
We have always believed that glasses are safe, but in fact, there are also classifications of glass materials, and some are poison glass.
After some glasses are bought home, the hot water explodes, this is the soda-lime glass, its cup body has seam lines, poor temperature tolerance tolerance, easy to burst under sudden cold and heat, and the glass slag is shattered after exploding, and it is more dangerous to be scalded by hot water.
Borosilicate glass is relatively safe, it is light, thin, translucent and non-toxic, the temperature difference is greater than 110 °C, and it is resistant to cold and heat and is not easy to burst.
After accidentally breaking, the broken glass is a large piece, which is easy to clean and not easy to hurt your hands.
In addition, there are people who prefer crystal glasses because of their better appearance, however, there are risks associated with such glasses.
Because some crystal glasses are made of lead, zinc, barium and other metal components, so that the transparency is high after being made, and it is fragile.
It is recommended that you can test the cup at home, alternating between hot and cold water, whether it has exploded or cracked, and see if it is safe and non-toxic.
Disposable paper cups
Disposable paper cups are convenient and fast, and everyone will use them when guests come to visit or have parties.
However, disposable paper cups are also dangerous, and they are exposed to contain fluorescent brighteners, which will melt into water when heated, and can cause harm to the body after long-term use.
In addition to fluorescent brighteners, disposable paper cups have a plastic inner membrane on the surface in order to have a waterproof effect, which becomes fragile in hot water and will release microplastics, which may change your intestinal microbial metabolism and affect immune function after inhalation into the human body.
Some paper cups are sprayed with some beautiful patterns and logos on the outer wall, and the ink used for spraying patterns usually contains toxic solvents such as benzene or toluene, which may come into contact with the lips and enter the human body with the water when drinking water, and after long-term accumulation, it will also cause great harm to health.
Therefore, in the new regulations for disposable paper cups, no pattern shall be printed within 15mm from the mouth of the cup to the body of the cup, and any pattern shall also be prohibited within 10mm above the bottom of the cup.
Inferior stainless steel cups
In winter, everyone has a thermos cup, but the thermos cup is really not safe.
CCTV has exposed the "deadly thermos cup", the material of this thermos cup is industrial-grade stainless steel, although the price is cheap, but the hot water is poisonous and the water is out, which is harmful to health.
The stainless steel thermos cup liner is 201 and 202 models, which will have heavy metals that will precipitate, cannot touch food, and is easy to corrode and rust.
Drinking water with this inferior thermos cup for a long time will cause symptoms such as dizziness, nausea, vomiting, and insomnia.
It is best to choose 316 material for the thermos cup, 316 is medical grade stainless steel, 304 is food grade stainless steel, 201 and 202 are industrial grade stainless steel.
You won't be able to tell what material the thermos cup is, you can buy a stainless steel potion to test it, if you find that it is an industrial-grade stainless steel cup, don't use it again.