The quality of thermos cups on the market varies. How should ordinary consumers identify them? They should focus on the thermal insulation performance of the liner structure, the degree of sealing between the lid and the bottle body, and whether the material releases harmful substances.
1. Identification of the thermal insulation of the inner bladder
This is the main technical indicator of the thermos cup. After filling with boiling water, tighten the cork or lid clockwise. After 2 to 3 minutes, touch the outer and lower parts of the cup body with your hands. The warm phenomenon means that the inner tank has lost the vacuum degree and cannot achieve a good thermal insulation effect.
2. Identify the sealing performance
Fill a glass of water and invert it for four or five minutes, screw the lid tightly, put the cup flat on the table, or shake it a few times. If there is no leakage, it means the sealing performance is good; in addition, look at the lid and mouth Whether the rotation is flexible and whether there is a gap.
3. Environmental protection identification of accessories
The environmental protection of plastic accessories is also a matter of concern. It can be identified by smell. If the cup is made of food-grade plastic, the smell is small, the surface is bright, burr-free, and the service life is long. It is not easy to age; ordinary plastic or recycled plastic is The smell is strong, the color is dark, the burrs are many, and the plastic is easy to age and break.
4. Identification of stainless steel materials
There are many specifications of stainless steel materials, of which 18/8 means that this stainless steel material contains 18% chromium and 8% nickel. Materials that meet this standard meet the national food-grade standard and are green and environmentally friendly products, and the products are rust-proof and corrosion-resistant. If the cup body is made of ordinary stainless steel cup, the color is white and dark, and if it is soaked in salt water with a concentration of 1% for 24 hours, rust spots will appear, which means that some elements contained in it exceed the standard, which will directly harm the human body. healthy.