The following identification methods can be used for stainless steel vacuum flasks:

(1) Simple identification method for heat preservation performance: Pour boiling water into the thermos cup and turn the cork or lid clockwise for 2-3 minutes, and then touch the outer surface of the cup with your hand. If the cup (pot) body has obvious warming phenomenon , Especially the lower part of the cup body heats up, indicating that the product has lost its vacuum and cannot achieve a good insulation effect, and the lower part of the insulated cup is always cool. Misunderstanding: Some people use their ears to determine whether there is a sizzling sound to determine its insulation performance, and the ears cannot hear whether it is vacuum.

(2) Sealing performance identification method: After adding water to the cup (pot), tighten the cork or lid in a clockwise direction, place the cup (pot) flat on the table, and there should be no water seeping out; The screwing in and out of the cup mouth should be flexible and there is no gap. Fill a glass of water upside down for four or five minutes, or shake it vigorously a few times to verify the leak.

(3) Plastic parts identification method: New plastic features: low odor, bright surface, no burrs, long service life and not easy to aging. The characteristics of ordinary plastics or recycled plastics: big smell, dark color, many burrs, plastics are easy to age and break easily. This will not only affect the service life, but also affect the sanitation of drinking water.

(4) Simple identification method for capacity: the depth of the inner tank is basically the same as the height of the outer shell (the difference is 16-18mm) and the capacity is in line with the nominal value. In order to cut corners and make up for the missing weight of the material, some domestic brands put it in the cup (pot) Add sand and cement blocks to it. Misunderstanding: A heavier cup (pot) is not necessarily good.

(5) The appearance recognition method of the cup. First, check whether the surface of the inner and outer tank is uniformly polished, whether there are bruises and scratches; second, whether the mouth welding is smooth and consistent, which is related to whether you feel comfortable when drinking water; third, whether the internal seal is tight, Whether the screw plug matches the cup body; look at the cup mouth, the rounder the better.

(6) Check the cup label and other accessories. See if the product name, capacity, caliber, manufacturer's name and site, the standard number used, the method of use, and the precautions in use are marked. A manufacturer that values ​​quality will strictly abide by the relevant national standards and express its product performance.

Customers should also pay attention when choosing products, not just look at the appearance, but also pay attention to whether the manual is an insulation product. Now some products are novel and generous in appearance, similar to thermal insulation products, but without thermal insulation performance. If there is a "wonderful cup" with a grass-green body, exquisite shape, smooth lines, and comfortable feel, the product does not deceive consumers, because the manual clearly states that it can be "warm hands in winter, not hot in summer", Consumers can only blame their own eyes.

Matters needing attention when using thermos cups (pots, bottles):

The thermos cup cannot hold fruit juice, milk, green tea or carbonated drinks for a long time. It needs to be washed carefully with a neutral detergent when it is first used.

Avoid collisions and impacts during use to avoid damaging the cup or plastic, causing insulation failure or water leakage. Use appropriate force when tightening the screw plug, and do not rotate it excessively to avoid failure of the screw plug. When drinking coffee, tea or beverages frequently, the inner liner will change color. This is normal, and it can be removed with a toothbrush dipped in toothpaste.