Thermos for tea. Choosing a quality

The history of the invention of the thermos begins in the 19th century and is associated with the name of the English inventor James Dewar Devar. But its purpose was not the invention of a container for maintaining the heat of hot liquids. Its purpose was a device for storing rarefied gases. After some time, his disciple and follower R. Burger found a niche for the commercial use of this invention. Soon his company gained great popularity and was engaged in nothing more than the production and sale of thermoses.

Modern tea thermoses for tea, which we meet everywhere, do not differ from the initial invention. And, as before, they are a glass or metal flask placed in the body. Despite the fact that this invention is very simple in its essence, it has been used in people's lives for quite a long time.

We choose a thermos

If the thermos for tea is to be actively used in various kinds of trips, hikes or travel, it is better to choose with a metal bulb for these purposes. It is much stronger and easily survive active operation for a long period. If you plan to use a thermos for tea in a domestic environment, then a glass bulb will do. Despite the fact that it is more fragile and vulnerable to mechanical influences, it is nevertheless more practical from the hygienic point of view. At the same time, with its main function, both the metal flask and the glass cope equally well.

It is believed that the thermos for tea in the plastic case keeps the temperature better. This may be due to a lower thermal conductivity of the plastic than the metal. A good thermos for tea even in a day is able to keep the temperature at 50 degrees.

Check for leaks

The choice of thermos should be approached very carefully and responsibly. After all, this item is purchased for prolonged use, and not for one day. First of all, it is worth checking how well and tightly the cap is screwed. This is the main criterion that affects the storage of the temperature of the liquid.

Volume of the flask

Also, the duration of the preservation of temperature depends on the volume of the flask. The larger the bulb, the longer the temperature lasts.

Foreign odors

When choosing a thermos, it must be opened. It should not give off any unpleasant odors. If the fragrance is present, this indicates a low quality of materials used for production. The operation of a thermos of low-quality components can cause harm to health.

When choosing a glass thermos, it should be shaken. The bulb must be tightly fixed, otherwise sooner or later it will break. In this regard, the metal bulb is much stronger, but with deformation, microcracks can form in it, which will adversely affect the thermal insulation abilities due to leakage failure.

Gourmets and connoisseurs recommend for using infusion and infusion to use thermoses with a glass bulb. They know exactly how to make tea in a thermos bottle. This allows you to maintain the delicate taste of the drink, which is particularly valued by amateurs and regulars of tea ceremonies.

Practical testing

The quality of the thermos can also be checked practically. If there is such an opportunity at the place of purchase, then this will be the best way to evaluate this product. To do this, fill it with boiled water and leave for 15 minutes. If during this time the case will heat up, then the thermos for tea is of poor quality. The liquid in it will cool down very quickly, and there is no sense in such an acquisition.

In the modern market there is a huge selection of thermoses that can meet the needs of any person as a design and practicality.
Thermoses for food were also widely used. They look like a saucepan and keep the temperature on the same principle.

So, the best thermos for tea should meet the following requirements:

1. Must not exude sharp, unpleasant odors.

2. The cover must seal the flask tightly.

3. The larger the volume of the bulb, the better the temperature is preserved.

4. The metal flask is more practical and durable in use, while the glass flask is more hygienic.

5. When filling with boiling water, the thermos body must not be heated.