How to choose a vacuum flask? What are the tips 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 water-filled container made of 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 contained inside to achieve the purpose of heat preservation.

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

1, see if the surface of the liner and the outer shell are polished uniformly, whether there are bruises and scratches;

2, see if the mouth welding is smooth and consistent, which is related to the feeling of comfort when drinking water;

3, see the poor quality of plastic parts, not only will affect the service life, but also affect the drinking water hygiene;

4, to 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, whether it leaks.

The industry suggests that it should focus 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, liner insulation identification This is the main technical indicators of the insulation cup, after filling with boiling water, tighten the stopper or lid clockwise, after 2~3 minutes, touch the outer surface and lower part of the cup body by hand, if the cup body 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 filled with a cup of water inverted for four or five minutes, screw the lid tightly, put the cup flat on the table, or force it a few times, if there is no leakage, it means good sealing performance; Is the screwing of the lid and the cup mouth flexible and whether there is a gap.

3, accessories environmental protection identification of the environmental protection of plastic parts is also a concern, can be identified by smell, if the cup is made of food-grade plastic, the smell is small, the surface is bright, no burrs, long service life is not easy to age; Ordinary plastics or recycled plastics have large odor, dark color, many burrs, and easy aging of plastics.