How to choose and buy high quality vacuum cup

The appearance of the first to see the cup. A look at the inner and outer bravery surface polishing is uniform, so if there is a bruising and scratch; 2 see if mouth welding smooth, this relationship a drink feel comfortable; The poor quality of plastic parts. Not only affect the service life and can also affect the health of drinking water; Four see if internal seal tightly. Plug and the cup body is proper. Whether screwing in spin out freely, whether is leaking. Filled with a cup of water to the horse under four, five minutes, or forced to jilt a few can verify whether is leaking. Then look at heat preservation performance, this is the main technique index sign of the vacuum cup. Usually impossible to check in accordance with the standards when the choose and buy, but can feel by filled with hot water after check, no insulation cup into hot water for two minutes after the lower cup body heats up, the thermal insulation cup bottom is always cool. Several the following methods: 1, vacuum insulation simple identification method: pour boiling water into vacuum cup within 2 - clockwise to tighten the cork or lid Touch a cup outside surface after 3 minutes, if there is a obvious phenomenon of warm cup body, the product has lost vacuum degree, cannot achieve good heat preservation effect. 2, sealing performance recognition method: after a cup of water, tighten the cork and lid clockwise, put the cup on the desktop, should be no water leakage; Close the lid and screw should be flexible, no gaps. 3, plastic accessories identification method: the characteristics of the new food-grade plastic smell is small, the surface light, no burr, long service life is not easy to aging. Ordinary plastic or recycled plastic smell great, colour and lustre is the feature of gray, burr, plastic aging more easy to fracture. 4, capacity, simple and easy method of identification, the depth of the tank and the height of the casing, ( A difference of 16 - 18毫米) Capacity and the nominal value. Some poor quality of vacuum in the cup to add sand, concrete to compensate for the loss of weight. Myth: cup ( Pot) The heavier is not necessarily good. 5 simple identification method, stainless steel material: stainless steel material specifications, 18/8 said the stainless steel material composition containing 18% chromium, nickel containing 8%, achieve this standard material, accord with national food grade standards are green environmental protection product, the product rust and corrosion resistance. Ordinary stainless steel cup body rendering Bai Hefa dark hair color, if in a concentration of 1% saline soak after 24 hours can produce rusty spot, its part of the element to exceed bid, directly endanger human body health.