Many people like to put a thermos in the office, the drawer at any time ready for tea, a work began to use the thermos to drink tea, drink to work tea are still warm.

Tea is rich in protein, fat, sugar, vitamins and minerals and other nutrients, is a natural health drink, which contains the tea polyphenols, caffeine, tannins, tea pigments, etc., and has a variety of pharmacological effects. If you use a thermos cup tea, tea leaves for a long time immersed in high-temperature water, like a warm fire decoction, tea polyphenols, tannins and other substances will be a large number of leaching, so that the color of tea is strong, bitter and astringent taste.

At the same time, as has been to maintain a very high water temperature, tea in the aromatic oils will soon be a large number of volatile, ellagic acid, theophylline, a large number of seepage, which not only reduces the nutritive value of the tea, reduces the tea aroma, will also make the increase in harmful substances. In addition, vitamin C and other nutrients in the water temperature of more than 80 ℃ will be destroyed, a long time high-temperature steeping will make its loss too much, thus reducing the health function of tea.

Some people also use enamel tea set tea, which is not good. Enamel tea set with a long time easy to produce wear and tear, so that the iron skin exposed, the metal content will dissolve with the tea, so that the tea color yellow and lose the original flavor. And enamel tea set heat dissipation, heat transfer fast, tea is also easy to dissipate.

If you want to drink hot tea, you can use the purple clay pot or ceramic tea set brewing, tea brewing, and then poured into the thermos.

Because tea is immersed in warm water in a thermos for a long time, just like a mild omelette, the tea polyphenols, tannins and other substances contained in the tea will be leached out in large quantities, and it is the tea that is strong in color and has a bitter and astringent taste.

What's more, because the water in the thermos will always maintain a very high water temperature, the aromatic oils in the tea will evaporate very quickly, which also reduces the fresh flavor that the tea should have. The most serious point is that the tea contains vitamin C and other nutrients in the water temperature of more than 80 ℃ will be destroyed, lose tea should be health care functions.