1.Simple identification method of vacuum insulation performance: Pour boiling water into the thermos cup and tighten the cork or cup clockwise for 2-3 minutes, then touch the outer surface of the cup body with your hands. If the cup body has obvious warm phenomenon, it means that the product has lost Vacuum, can not achieve a good heat preservation effect.
2. Sealing performance identification method: After adding water to the cup, tighten the cork and lid clockwise, place the cup flat on the table, there should be no water leakage; the screwing of the lid and the mouth of the cup should be flexible without gaps.
3. Identification method of plastic parts: Food-grade new plastics are characterized by low odor, 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 identification method of capacity: the depth of the liner is basically the same as the height of the outer shell, (the difference is 16-18MM) and the capacity 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 for stainless steel materials: There are many specifications of stainless steel materials, among which 18/8 means that the 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. The product is rust-proof ,preservative. The color of ordinary stainless steel cups is whitish and dark. If soaked in 1% salt water for 24 hours, rust spots will appear. Some elements contained in it exceed the standard, which directly endangers human health.
