1, the vacuum insulation performance Simple identification method: The boiling water into the thermos flask in a clockwise tightening of the cork or cup cover 2-3 minutes after the hand touch Cup outside the surface, if the cup body has obvious warm phenomenon, indicating that the product has lost the vacuum degree, can not achieve good insulation effect.
2, Seal Performance Identification method: in the cup after adding water, the clockwise direction of the bottle stopper and cup cover, the Cup flat on the table, should be no water leakage, cup cap and cup mouth of the rotation should be flexible, no gap.
3, Plastic parts recognition method: Food grade new plastic is characterized by small smell, bright surface, no burr, long life is not easy to aging.
Ordinary plastic or recycled plastic is characterized by a large odor, color gray, burr, plastic easy to aging easily broken.
4, Simple capacity identification method: the depth of the liner and the height of the shell is basically consistent, (phase 16-18mm) capacity and nominal value of the corresponding. Some of the less-quality cups add sand and cement to the cup to make up for the missing weight.
Myth: Cup (kettle) heavier is not necessarily good.
5, stainless steel materials Simple identification method: Stainless steel material specifications, of which 18/8 of the stainless steel materials containing 18% chromium, including 8% of the nickel, to achieve this standard materials, in line with national food standards are green products, rust-proof products, corrosion resistance.
Ordinary stainless steel cup body color pale and dark, if the concentration of 1% salt water soaked 24 hours later will produce rust spots, which contain some elements exceeding the standard, directly endanger the health of the human body.