Can A Stainless Steel Vacuum Flask Make Tea?

Can a stainless steel vacuum flask be used to make tea?

Can.

Regarding this issue, the media has paid great attention to it before and has done some experiments:

I used a brand-new stainless steel water cup to make tea in it, and let it stand for 72 hours with the lid tightly closed. The result was that the cup appeared "corrosion". Corrosive, but long-term accumulation of tea dirt is easy to harm the body.

Will there be a change in the taste of tea made in a metal vacuum flask?

Can.

Make tea normally in a vacuum flask and a common glass. After a period of time, there are indeed many differences in the taste of the tea soup.

First is the taste:

In contrast, because the thermos cup keeps the water at a high temperature for a long time, the tea leaves are soaked in high-temperature and constant-temperature water for a long time, just like decoction with a warm fire. The vitamins in the tea are destroyed and the aromatic oil is volatile. The leaching of tannins and theophylline in large quantities not only reduces the nutritional value of tea, but also makes the tea juice unscented and the tea tastes bitter. Even because of the long steeping time, the tea may release heavy metal substances, which is harmful to health.

The second is the smell:

I made a comparison and asked my friends around me to taste it. Everyone said that in terms of smell, the tea soup brewed in the thermos was not as fragrant as the tea soup in the glass. It was speculated that this should also be related to the high temperature in the thermos.

We all know that you still have to drink tea while it is hot. 50-60 degrees is the suitable temperature for most teas. If the temperature is too low, it will not taste good, and if the temperature is too high, it will damage the oral mucosa.

But since the thermos cup is already in use, it can't be thrown away for nothing, right?

So if you want to use a thermos cup to make tea, Xiaofang provides a few suggestions for your reference:

It is better to use dark tea, old white tea, and higher-quality black tea.

Don't inject water with too high temperature, it will not only spoil the taste, but also because of the characteristics of the vacuum flask, it is not good for the mouth.

You can put a little less tea to prevent the flavor from becoming too strong.

Of course, the best way is to separate the tea from the water. Pour the brewed tea soup into a thermos for storage, so that the tea leaves will not be soaked in the water for a long time, and it can also keep the tea soup warm.

Finally, the vacuum flask should also be cleaned in time! The relatively humid and warm environment and the ravines in the shape of the vacuum flask will also create a good living environment for bacteria, so timely cleaning is very important!