1. What is the material of the drinking cup?
1, glass
Of all materials, glass is relatively the safest. Glass cups are usually made of inorganic silicates, which are fired at a high temperature of more than 600 degrees. Because of their relatively stable chemical composition, they will not produce harmful substances in the firing process. Moreover, the glass surface is smooth and easy to clean, and bacteria and dirt are not easy to breed on the cup wall.
Note: If you are using the glass for the second time, you are afraid of boiling water. You should first pour in a little hot water, gently shake the preheated glass, and then pour in hot water for later use.
2. Plastic cups
Many people are worried that plastic cups will cause cancer. In fact, it is relatively safe to choose brands that meet the national quality inspection standards. Generally speaking, the number 1-7 is printed on the bottom of plastic cups. The higher the number, the higher the quality. Common materials are No.5 PP (polypropylene) and No.7 PC (polycarbonate). PP cup has good heat resistance, melting point as high as 167℃ and stable chemical properties. It is a plastic material that can be put into microwave oven. The cup made of PC can't hold hot water, so it is not suitable for sunlight, because high temperature may release toxic bisphenol A from this material. In addition, although the surface of the plastic cup seems smooth, there are actually many gaps, which are easy to hide evil people and shelter evil people; Moreover, plastic cups can absorb dust and bacteria more easily.
3. Ceramic cups
Beautiful shape and diverse patterns, enamel cups are very popular among young people, with more than one hand. People who like tea like to use teapots. The purple sand teapot is not glazed inside and outside, keeping tiny pores, good air permeability and strong adsorption, which can effectively prevent the loss of tea fragrance. Therefore, teapots and cups are recommended for daily tea drinking.
4. Enamel Cup
An enamel cup is a kind of vessel with enamel inside and outside. Its advantage is that it can prevent the iron and metal inside from rusting, and it is not as easy to break as porcelain, so it takes into account the advantages of metal and porcelain.
But in recent years, fewer and fewer people use enamel cups, because the porcelain on its surface is composed of sodium silicate and metal salts, which may contain harmful metal elements such as lead and cadmium. These elements will seep out under acidic conditions or heating conditions, which is easy to harm health. Moreover, the enamel cup is easy to lose porcelain, and the exposed metal core is easy to rust, which is also harmful to human body if it is used continuously.
Suggestion: don't use enamel products to contain acidic substances; Broken enamel products should not be used for food and water.
5. Stainless steel cups
Stainless steel cups are corrosion-resistant, wear-resistant and not easily broken, and are widely used as thermos cups and become modern cups. However, because it is an alloy product, it may contain more heavy metal substances. If used improperly, these substances are easy to seep out or react chemically, which may produce harmful substances.
Tip: Don't use stainless steel cups to hold acidic drinks, such as juice, coffee and carbonated drinks. Don't hold soy sauce, vinegar, vegetable soup, tea, etc. It has been a long time.
Second, how to clean the cup?
1, toothpaste
Squeeze a small amount of toothpaste on the tea set, and spread the toothpaste evenly on the surface of the tea set by hand or cotton swab. Wash these tea sets with water later, so that the tea stains can be cleaned easily.
2. salt
Apply edible salt to the inside of teacups and teapots, especially where there are tea stains, then brush the teacups with a toothbrush, and finally rinse them with clean water.
3. vinegar
Metal tea partition is easy to turn black because of tea dirt. If it can't be washed off with neutral detergent, it can be soaked in vinegar or bleach.
4. Cleaning powder
Soak the tea set in the solution of bleach or cleaning powder and leave it overnight to remove tea stains.
5. Sodium bicarbonate
If the tea scale is deposited for a long time and is not easy to clean, you can soak it in heated rice vinegar or baking soda for a whole day, and then brush it with a toothbrush, which is easy to clean.
6. Broken eggshells
Crush the eggshell, put it into a dirty cup to be cleaned, then drop a few drops of vinegar, shake it slowly, and then clean it with a brush, so that the parts that are not easy to clean at ordinary times can also be cleaned.
Third, how to disinfect the water cup?
1, boiling disinfection method
In the family, boiling disinfection of tableware such as bowls, chopsticks, plates, cups and spoons is the simplest and most reliable disinfection method. Note that the water surface must cover the tableware, and the tableware should be placed upright and not overlapped, so that the water will boil more than 5%. If microbial pollution such as hepatitis virus is suspected, let the water boil 15 ~ 20%.
2, ultraviolet disinfection method
Generally, it is articles that need disinfection, such as clothes, bedding, books, etc. Are exposed to the sun. Disinfected items need to be spread out and turned frequently so that they can be exposed to the sun all around. Usually, common pathogens can be killed by sunlight every time they are exposed to sunlight for 4 ~ 6h hours, and the effect is better after exposure for several days.
3, air cleaning method
To keep the indoor air fresh, it is necessary to open the window for ventilation; 10 Open the window every time? 30, make the air circulate, and the germs are discharged outdoors.
The above is a good introduction about what materials are used for drinking cups. When choosing drinking cups, we must pay attention to choosing safe materials with guaranteed quality. In addition, when using the water cup, we should pay attention to regular disinfection, so as to ensure the cleanliness of the water cup. You can clean the water cup according to the above method to make yourself safer when drinking water.