What material is the best water cup?
Glass: practical, safe and crack-proof.
The first choice for drinking cups should be glasses, especially for office and home users. Glass is not only transparent and beautiful, but also the healthiest and safest cup made of all materials. This kind of glass is made of inorganic silicate, and there are no organic chemicals in the firing process. When people drink water or other drinks from cups, 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. The only thing to note is that glass is most afraid of thermal expansion and cold contraction. Don't immediately put hot water into a glass that is too cold to prevent it from bursting.
Glass itself has no color, so there are two possibilities to produce colored glass: one is natural color, and the original glass contains some minerals, which makes the glass colorful; B Most colored glasses are made by adding pigments during processing, and these pigments generally contain heavy metals. However, coloring cannot be used as the cause of glass problems.
Plastic cup: Choose food-grade plastic.
Plastic cups are loved by many people because of their changeable shapes, bright colors and fear of being beaten, which is very suitable for outdoor users and office workers. Generally speaking, there are signs on the bottom of plastic cups, which are the numbers on the small triangle. The common one is "05", which means that the material of the cup is PP (polypropylene). The cup made of PP has good heat resistance, the melting point is 170℃~ 172℃, and its chemical properties are relatively stable. It is stable to all kinds of chemical reagents except concentrated nitric acid. But the problem of ordinary plastic cups is very common. Plastics belong to polymer chemical materials. When hot water or boiled water is filled in plastic cups, polymers can easily precipitate and dissolve in water, which is harmful to human health after drinking. Moreover, there are many pores in the internal microstructure of plastic, which contain dirt, and improper cleaning will breed bacteria. Therefore, the choice of plastic cups is very important for the choice of plastic materials, and food-grade plastics that meet national standards must be selected. That is PP material.
Ceramic cup: it is best to choose underglaze color.
Colorful ceramic cups are very pleasing, but in fact, there are huge hidden dangers in those bright pigments. The inner walls of low-priced colored ceramic cups are generally coated with a layer of glaze. When the glazed cup is filled with boiled water or drinks with high acidity and alkalinity, some heavy metal toxic elements such as aluminum in the glazed cup can easily precipitate and dissolve into the liquid. At this time, if people drink liquid containing chemicals, they will be hurt. When using ceramic cups, it is best to use natural color cups. If you can't resist the temptation of color, reach out and touch the color surface. If the surface is smooth, it means underglaze color or underglaze color, which is relatively safe. If it is uneven, it will fall off with nails, which means it is glazed. It is best not to buy it.
Stainless steel cup: Do not hold acidic drinks.
The advantages of stainless steel cups are durability, rust prevention and corrosion prevention. However, stainless steel cups are alloy products, which contain many heavy metals, such as nickel, chromium and manganese. If used improperly, these heavy metals will be released easily, which is harmful to health. Therefore, in daily use, be careful not to use stainless steel cups to hold acidic drinks, such as juice, coffee, carbonated drinks, etc. Do not store soy sauce, vinegar, vegetable soup, tea, etc. For a long time, the electrolyte in these foods may react with the heavy metals in stainless steel, leading to the precipitation of heavy metals. When cleaning stainless steel cups, do not use strong alkali or oxidizing chemicals, such as soda and bleaching powder. These substances also easily react with stainless steel.
Paper cups: Use less disposable paper cups.
Now almost every family and unit will prepare disposable sanitary paper cups, which are hygienic and convenient for one person to use and throw away after use, but such an ordinary cup hides many problems. There are three kinds of paper cups on the market now: the first one is made of white cardboard, which can't hold water and oil. The second is a waxed paper cup. As long as the water temperature exceeds 40℃, the wax will melt and release carcinogenic polycyclic aromatic hydrocarbons. The third kind is a paper-plastic cup. If the selected materials are not good or the processing technology is not enough, polyethylene will crack and change during hot melting or smearing on paper cups, resulting in carcinogens. In order to increase the toughness and rigidity of the cup, a plasticizer will be added to the paper cup. If the dosage is too large or illegal plasticizer is used, the sanitary conditions will be difficult to guarantee.
Enamel cup: it should be eliminated decisively after being damaged.
Enamel cups are also a good choice. Enamel is a kind of composite material in which inorganic glass material is melted and solidified on metal by thousands of degrees. The enamel coating on the metal surface can prevent rust, so that when the metal is heated, it will not form an oxide layer on the surface, and it can resist the corrosion of various liquids. Enamel products do not contain harmful substances such as lead and are easy to carry and clean. They are widely used as tableware and washing utensils in daily life. Enamel cups have one disadvantage. Enamel cups are afraid of bumping and the surface is easy to be damaged. The research shows that damaged enamel cups are easy to precipitate harmful substances when holding drinks, so they should be eliminated decisively.
What material is the best water cup? For example, disposable plastic cups are not recommended to be used frequently and are not suitable for hot water. Otherwise, you will smell pungent smell when drinking water, which has certain toxic effect and will bring harm to your body. People who use water cups also need to do daily cleaning work to ensure that they can use water cups normally. If the cup is damaged, replace it in time, and try not to let it affect your daily health.
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