How to choose a vacuum flask? What are the skills for buying stainless steel mugs? What are the selection strategies for stainless steel vacuum flasks? A good stainless steel vacuum flask can accompany us through the spring, summer, autumn and winter, because it can better keep warm and keep cold. A good vacuum cup can keep warm for more than 6 hours, but how to choose a good cup?

The vacuum flask is generally a container of water filled with stainless steel and a vacuum layer. The top is covered and the seal is tight. The vacuum insulation layer can delay the heat dissipation of the liquid such as water inside to achieve the purpose of heat preservation.

The first thing to look at is the appearance of the cup.

See if the surface of the liner and the outer bladder are evenly polished, and whether there are bruises or scratches;

Second, see if the mouth welding is smooth and consistent, which is related to whether the feeling of drinking water is comfortable;

Third, the poor quality of plastic parts will not only affect the service life, but also affect the sanitation of drinking water;

Fourth, see if the internal seal is tight, whether the screw plug and the cup body fit properly, whether it is free to screw in and out, and whether it leaks.

The insiders suggest that the focus should be on the insulation performance of the liner structure, the degree of sealing of the lid and the bottle body, whether the material releases harmful substances, etc., which can be identified by three measures.

1. Insulation identification of the inner liner This is the main technical index of the vacuum flask. After filling with boiling water, tighten the stopper or lid clockwise clockwise. After 2~3 minutes, touch the outer surface and lower part of the cup body. If the cup is found. There is obvious warmth in the upper part of the cup, which indicates that the inner liner has lost the vacuum and cannot achieve good thermal insulation effect.

2. Identify the sealing performance and fill it with a cup of water for 4 or 5 minutes. Tighten the lid, place the cup flat on the table, or slam it a few times. If there is no leakage, the sealing performance is good; Whether the screwing of the lid and the cup is flexible and whether there is a gap.

3. Environmental protection of accessories The environmental protection of plastic parts is also a problem worthy of attention. It can be identified by smell. If the cup is made of food grade plastic, the smell is small, the surface is bright, no burr, long service life and not easy to age; Ordinary plastics or recycled plastics have large odor, dark color, many burrs, and easy aging of plastics