Is there any harm in making tea in a thermos cup Can you make tea in a thermos cup

No. No matter what material the thermos cup is made, it is not suitable for making tea.

When making tea in a thermos cup, because the tea leaves are soaked in high-temperature and constant-temperature water for a long time, as if boiling in a warm fire, a large number of vitamins in the tea are destroyed, aromatic oils are volatilized, and a large number of tannic acid and theophylline are leached, which not only reduces the nutritional value of tea, but also makes the tea juice fragrant and bitter, and even because the soaking time is too long, the tea may release heavy metal substances, which is harmful to human health.

If you take into account the heat preservation effect, you can brew hot tea liquid in a ceramic cup and other utensils, and pour it into a thermos cup after removing the tea leaves, so that you can drink hot tea at any time.

1. It is harmful to make tea in a thermos cup. It may cause tea to be too alkaline, and the healthy environment of the human body is weakly alkaline, and too alkaline will destroy the homeostasis of the human body. Tea contains a lot of tannins, theophylline, aromatic oils and a variety of vitamins, and should only be brewed with water around 80 degrees Celsius.

If you use a thermos cup to make tea, so that the tea leaves are soaked in high-temperature, constant-temperature water for a long time, it is like decoction with a warm fire. In this way, a large number of vitamins in tea are destroyed, aromatic oils are volatilized, and tannic acid and theophylline are leached in large quantities, which not only reduces the nutritional value of tea, but also makes the tea juice fragranceless, the tea taste bitter and astringent, and the harmful substances increase. If this tea is consumed for a long time, it will be harmful to health and lead to the occurrence of a variety of diseases of the digestive, cardiovascular, nervous and hematopoietic systems.

It is recommended to use a porcelain cup.

2. Tea is a drink rich in nutrients. Tea contains tea polyphenols, tannins, aromatic substances, amino acids, and a variety of vitamins. When boiling water is used to brew tea in a pot or ordinary cup, a large number of beneficial ingredients are dissolved in the water, so that the tea soup produces an aromatic smell, and at the same time, it makes the tea polyphenols and tannins and other components slightly boil in the water, so that the tea soup has a slightly refreshing and bitter taste, which can be said to be just right.

The temperature of making tea in a thermos cup is kept very high, so that the aromatic substances volatilize quickly, thus reducing the aroma. In addition, due to the high temperature, the tea polyphenols and tannins can be scratched out too much, so that the tea soup is thick, bitter and astringent, and has a stuffy taste. In addition, because vitamins are not resistant to high temperatures, they are lost by soaking at high temperatures for a long time.

Therefore, it is not advisable to use a thermos cup to make tea. In the same way, it is not advisable to put tea leaves in a pot and boil them to drink.

3. In addition, the surface of the inner tank of the glass thermos cup has a metal coating, and some of the ingredients in the tea will have a chemical reaction with the metal coating, resulting in a variety of trace chemical components, some of which may be harmful to the human body for a long time, and similar stainless steel thermos cups also have a similar situation, so we should pay attention to choosing the right utensils when making tea. In addition to thermos cups, it is also inappropriate to use enamel tea sets to make tea. The enamel tea set is easy to wear and tear after a long time, exposing the iron sheet, and the metal components will dissolve in the tea, making the tea yellow and lose its original flavor.

Moreover, the enamel tea set dissipates heat and transmits heat quickly, and the tea fragrance is also easy to dissipate. Therefore, to drink a cup of hot tea with a healthy and strong tea aroma, it is best to brew it with a purple clay pot or ceramic tea set.

The dangers of making tea in a thermos cup:

Brewing tea in a thermos cup will affect the taste, and the tea leaves are soaked in the thermos cup, which is equivalent to being boiled in the pot, and all the substances in the tea will volatilize after a long time, making the tea thicker and bitterer. Besides, drinking strong tea is also not good for your health. Tea is also not suitable for being scalded at high temperatures, which will make the substances in the tea, such as vitamins, not easily absorbed by the body.

In addition, there will be trace amounts of pesticides and other unclean things in some tea leaves, if the tea leaves are not washed and soaked in a thermos cup all the time, those harmful substances will be absorbed into the water, and then drunk into the human body, resulting in the deterioration of the human body. And if there are many harmful substances in the tea, people will be poisoned if they drink it.

Sometimes the quality of the thermos cup bought is not good, and the teacup is not cleaned in time, and then the tea will be dirty after brewing for a long time, which is extremely unfavorable to the body after accumulation. There are certain disadvantages to making tea in a thermos cup, but some people still choose to use a thermos cup to make tea for convenience.

The correct way to make tea in a thermos cup:

1. Brew the tea and put it into the thermos cup.

According to the normal way, brew delicious tea, pour out the tea and put it into a thermos cup, which is equivalent to leaving the tea in a "delicious" state. Although the tea polyphenols in the tea will be oxidized in the future and have a certain impact on the flavor and taste, the flavor will be much better than the way that the tea leaves are always in the thermos cup.

2. Try to drink it in a short time after making tea.

The thermos cup has a good temperature lock function, which is especially obvious in winter, but if you are worried that the taste is not very good after soaking for a long time, you can put less tea at a time, and after making tea, it is best to drink it quickly at a moderate temperature. Of course, if you really can't finish it, you can also put the lid on, but not for too long.

Hazards: If the tea is soaked in high-temperature water for a long time, just like a warm decoction, tea polyphenols, tannins and other substances will be leached out in large quantities, making the tea rich in color and bitter and astringent.

At the same time, the high water temperature will also make the aromatic oil in the tea volatilize rapidly, reducing the fragrance of the tea. In addition, nutrients such as vitamin C can also be destroyed when the water temperature exceeds 80, and the health value is greatly reduced.

Therefore, it is not advisable to use a thermos cup to make tea, if you want to drink hot tea, you can use a purple clay pot or ceramic cup and other tea utensils to brew, and the tea can be poured into a thermos cup after brewing. If the quality of the tea soup is high, it should also be brewed and drunk.

The hazards of making tea in a thermos cup mainly include affecting the taste of tea and generating tea scale, which is not easy to clean.

1. Affect the taste of tea: You Xuanjian tea is suitable for brewing with about 80 water, which can produce just the right amount of refreshing tea aroma and bitterness. But it is not suitable for long-term high-temperature soaking, the thermal insulation effect of the thermos cup is relatively strong, if you use the thermos cup to make tea, it is easy to make the tea stuffy in the cup for a long time, which will increase the bitterness and astringency of the tea, and affect the overall taste.

2. Tea scale is not easy to clean: the inner wall of the thermos cup is easy to adhere to tea scale, and the cup mouth is relatively narrow, the cup body is relatively long, and it is not easy to clean it. It is recommended to choose a cup that is easier to clean and dissipate heat.

The right way to make tea

1. Scalding kettle: Before making tea, you need to use boiling water to scald the kettle, one can remove the peculiar smell in the pot, and the other is hot kettle to help volatilize the tea aroma.

2. Warm the cup: pour hot water into the tea cup with a hot pot, and then warm the cup.

3. Tea: Generally, the teapot spout used to make tea is small, and the correct way to make tea needs to first put the tea leaves into the tea lotus, appreciate the appearance of the tea leaves, and then use the teaspoon to dial the tea leaves in the tea lotus into the pot, and the amount of tea is one-third of the pot.

4. High chong: To brew tea, you need to lift the kettle high, and the water is bet from the high point, so that the tea leaves roll in the pot and spread out, so as to brew the tea flavor more fully, commonly known as high chong.

5. Scraping: Scrape off a layer of foam on the surface of the tea, and then cover the lid and let it stand for a while.

6. Low pour: pour the brewed tea into the cup, and the distance between the spout of the teapot and the teacup should be low, so as to avoid the ineffective dispersion of the aroma in the tea soup, commonly known as low bubble. This way it won't foam and it won't spill.

7. Smell the fragrance: Before tasting tea, you need to look at its color and smell its fragrance before you can taste its taste.

8. Tasting: The correct way to make tea is to raise a glass to send the tea soup to the nose to smell the fragrance, then press the rim of the cup with your thumb and index finger, hold the bottom of the cup with your middle finger, raise your glass and pour a little tea soup into the mouth, and taste the soup at the tip of the tongue.

I often see people like to walk around with a teacup when they are fine, and the average person may take the tea booth, and it is a tea brewed in a thermos cup, drinking tea is indeed beneficial, but drinking tea should pay attention to some taboos, many people may not have thought about whether they can use a thermos cup to make tea, is it good to make tea in a thermos cup? Is it good to make tea in a thermos cup?

1. Affect the taste of tea

The thermos cup has the effect of heat preservation, and the tea soaked in the thermos cup for a long time will affect the sweet and mellow taste of the tea itself, and the tea will be slightly bitter and astringent, and the original nutritional value of the tea will be lost when the tea is brewed in the thermos cup.

2. Loss of vitamins

Tea contains vitamins, tea polyphenols, aromatic oils and other substances, and the health care function of tea will lose its effect when tea is soaked in a thermos cup for a long time.

3. It is not conducive to the cleaning of tea sets

After brewing tea, it is easy to cause tea scale, which is the pigmentation of tea leaves, which is slowly formed after a long time of tea water. Tea scale is difficult to clean, and tea scale is also very good attached to the thermos cup.

4. What kind of tea utensils should be used to make tea?

The best utensils for making tea are purple sand, ceramics, or high borosilicate materials, and the tea utensils of these materials are beneficial to the human body after making tea, especially the purple clay pot containing minerals, which not only tastes good in the tea, but also is very good for the body.

5. The benefits of making tea in cold water

1) There is a class of healthy ingredients in tea - tea polysaccharides, which have the effects of anti-radiation, enhancing immunity, reducing plasma total cholesterol, and lowering blood sugar. However, this polysaccharide is different from other beneficial substances in tea. It is very sensitive to heat and can be wreaked havoc if brewed with hot water, while brewing with cold water can effectively retain such beneficial ingredients.

2) Japanese scholar Atsuo Shimizu once did the following experiments: he used cold water, warm water, and boiling water to extract tea extracts, and then used mice with high blood sugar for experiments. It was found that only the tea extract leached in cold water could significantly reduce the blood sugar of hyperglycemic mice, up to 40%.

It can be seen that drinking tea is a very important information for diabetics or friends with a family history of diabetes, and it is worth paying attention to. Especially cold water tea, it is more suitable for this kind of people! And other beneficial ingredients in tea, such as:

Although the precipitation rate of tea polyphenols and theanine is higher under hot water brewing, the precipitation rate can also reach more than 65% in cold water brewing. Interestingly, the precipitation rate of caffeine is lower than that of hot brew in the case of cold brewing, which is an important information for friends who are sensitive to caffeine (can't sleep when they drink tea).

3) You can first use cold boiled water to make tea, get the tea polysaccharides you need, and then use hot water to brew Yubi tea, so that a variety of healthy ingredients in the tea are drunk. Especially when you go out, sometimes it is inconvenient to carry a teacup, and you want to drink tea, you can buy a bottle of mineral water in advance, brew some tea, and wait until you want to drink, the taste of tea has been completely soaked in mineral water, cold brew tea, it is a healthy and convenient way to drink tea.