How to buy high quality mug?

  First look at the appearance of the cup. A look at the liner and the outer surface of the gall bladder polishing is uniform, whether scratches and scratches flaws;
 
  Second, see if the mouth of the welding is smooth and consistent, it is a feeling of comfort when drinking water;
 
  Third, poor quality plastic parts. Not only will affect the service life, but also affect drinking water hygiene;
 
  Fourth, see the internal seal is tight. Screw plug and cup body with the right fit. Screw into the spin out is free, whether leakage. Fill a glass of water upside down for four or five minutes or force a few times to verify whether the leak. Look at the insulation performance, this is the main technical indicators insulation Cup. Ordinary purchase can not be checked in accordance with the standard, but can be filled with hot water after hand check, non-insulated cup filled with hot water two minutes after the lower part of the cup will be hot, while the lower part of the insulation cup is always cool.
 
  There are several specific ways:
 
  1, vacuum insulation performance Easy identification method: the boiling water into the insulation cup clockwise screwed corks or lid 2-3 minutes after touching the outer surface of the cup body, if the cup has a clear phenomenon of warming, indicating that the product Has lost the vacuum, can not achieve a good insulation effect.
 
  2, sealing performance identification method: After the cup of water, tighten the stopper and the lid clockwise, the cup flat on the desktop, should be no water leakage; cup lid and cup mouth should be flexible, there is no gap .
 
  3, plastic parts identification method: Food grade new plastic is characterized by small odor, bright surface, no burrs, long service life is not easy to aging. Ordinary plastic or plastic recycling is characterized by smell, dark gray, burr and more easy to break plastic aging.
 
  4, the capacity of simple identification method: the depth of the liner and the shell is basically the same height (a difference of 16-18MM) capacity consistent with the nominal value. Some poor quality mugs add sand and cement blocks to make up for the missing weight. Myth: cup (pot) heavier is not necessarily good.
 
  5, simple identification of stainless steel: Stainless steel specifications many, of which 18/8 said the stainless steel composition with 18% chromium, containing 8% nickel, to achieve this standard material, in line with national food-grade standards are green products, products Rust, corrosion-resistant. Ordinary stainless steel cup body color appears white and dark, if the concentration of 1% brine immersion for 24 hours will produce rust, which contains some elements in excess, directly endanger the health of the human body.