1. Simple identification method of vacuum insulation performance: Pour boiling water into the thermos cup and tighten the cork or lid clockwise for 2-3 minutes, then touch the outer surface of the cup body with your hands. If the cup body is obviously warm, it means the product is The vacuum degree has been lost and a good thermal insulation effect cannot be achieved.
2. Sealing performance identification method: after adding water to the cup, tighten the bottle stopper and cup cover clockwise, and place the cup flat on the table, there should be no water leakage; the cup cover and the cup mouth should be flexibly screwed without gaps .
3. Recognition method of plastic parts: The characteristics of food-grade new plastics are small smell, bright surface, no burrs, long service life and not easy to age. Ordinary plastics or recycled plastics are characterized by strong odor, dark color, many burrs, and plastics are easy to age and break.
4. Simple capacity identification method: the depth of the inner tank is basically the same as the height of the outer casing, and the capacity (the difference is 16-18MM) is consistent with the nominal value. Some poor quality thermos cups add sand and cement blocks to the cup to make up for the missing weight. Myth: A heavier cup (pot) is not necessarily better.
5. Simple identification method of stainless steel material: There are many specifications of stainless steel material, of which 18/8 means that the composition of this stainless steel material contains 18% chromium and 8% nickel. Rust and corrosion resistant. The color of the ordinary stainless steel cup is whitish and dark. If it is soaked in salt water with a concentration of 1% for 24 hours, rust spots will occur. Some of the elements contained in it exceed the standard, which directly endangers human health.
