Selection guide for vacuum flask! See if you bought everything right?

Deep into the winter, the essential thing in life is the vacuum flask. When buying a vacuum flask, what dimensions should be considered to choose the most suitable vacuum flask?

Q: Is the insulation performance good?

The insulation of the inner tank is the main performance index of the vacuum flask.

You can fill the thermos cup with boiling water and cover the lid, and then touch the cup body with your hands after two or three minutes. If the cup body is found to have obvious warming phenomenon, it means that the insulation effect of the inner tank is unqualified.

Only a cup with good heat preservation can withstand the sudden need for drinking water! Take it out to play for a day, you are not thirsty when you play, you have to drink water as soon as you go home, it is cold water if the insulation effect is not qualified

Q: Who should I choose for the inner wall coating?

The inner wall of mainstream stainless steel vacuum flask is mainly divided into three processes. They are the matte surface of an ordinary vacuum flask, and some mid-to-high-end mirror surfaces.

Compared with ordinary matte surface, the mirror surface is more resistant to dirt and easier to clean.

In order to make the result more obvious, we used a vacuum flask to make tea, which is not repeated for three days.

It can be seen that every thermos cup is very dirty.

If we touch the inner wall with our fingers, we will find the inner wall of the mirror surface. It is easier to wipe off the tea stain with a light touch, while the inner wall of the matte surface cannot be completely wiped off.

In this way, under normal circumstances, the mirrored vacuum flask is easier to clean, will not hide dirt, and avoid bacteria. Old mothers must consider all aspects!

Q: Can I hold drinks?

Many years ago, mainstream vacuum flasks were divided into two types of stainless steel inner walls, 201 and 304. 201 could only hold water. If it was filled with Coke, the acidic beverage such as fruit juice would undergo a chemical reaction, precipitate metal ions, and corrode and rust. And 304 does not have this problem, it can be filled with beverages, it can be regarded as a relatively safe material many years ago.

And now it has 16 stainless steel material, medical grade quality, more stable than 304, and less likely to be corroded. If children want to drink juice or carbonated drinks, they can pour them in the cup and take them out.

Q: Drinking water experience is important?

The primary factor affecting the drinking experience is of course the way the thermos is opened. At present, the mainstream thermos cups on the market are mainly divided into two opening methods: one-key opening and screwing.

The screw-top thermos has a better drinking experience, but it is not convenient to rotate. Now it also has a half-rotation design, which can be opened with one hand when it is picked up.

And the comfort level will also be upgraded, adding detachable plastic components, the part in contact with the lips is very round and soft, and it is more comfortable than the metal cup!

Q: Is the sealing effect good?

Many cups seem delicate, but the tightness is not good, which makes people very headache.

We can tighten the lid of the thermos cup after it is filled with water, put it upside down for 4-5 minutes, place the cup flat on the table, or shake it a few times. If no leakage is found, it means that the sealing performance is better.

Of course, you have to see if the cup lid is screwed in and screwed out flexibly, and there is no gap.