If the quality of any cup is not good, the safety of the user will be endangered during use, so don't make up your mind just because of the good-looking appearance of the stainless steel vacuum flask. So how can we know that the quality of the vacuum flask is good? Today the vacuum flask factory will talk about the four rules of vacuum flask selection:

1. Hygiene: It means that the raw materials of the thermos must be healthy and hygienic. The material of the vacuum flask is mainly stainless steel and plastic. The plastic cover and rubber ring must be made of environmentally friendly materials that are harmless to the human body or do not pollute the environment. Never add BPA harmful chemicals. The plastic used in the lid is PP food-grade plastic. The simple way to measure is to smell it with the nose, and there should be no odors or odors.

2. Heat preservation: According to the light industry standard (QB/T2332), the heat preservation standard of the stainless steel vacuum cup (pot) is: fill the cup with boiling water above 95 degrees and cover the lid at a room temperature of 20 degrees. After 6 hours, the water temperature of a cup with a capacity of less than 400ML should not be lower than 42 degrees, and a cup with a capacity of more than 400ML should not be lower than 54 degrees.

3. Tightness: This is a point that people consider more when buying a vacuum flask. Excellent sealing performance is the key to purchasing a vacuum flask, and an excellent vacuum flask must be drip-proof.

4. Reliability: It is necessary to know whether the relevant products are from a company that specializes in manufacturing thermos cups. When the product has quality problems, whether it can obtain after-sales service or exchange in time, it is wise to buy corporate products that can protect the rights and interests of consumers.

So when choosing, we can use this method to carry out some simple tests, so that we can know whether the quality of the cup we are in use is good or bad.