There are many varieties of stainless steel thermos cups sold on the market, the price difference is also very large, for some consumers, do not understand its principle, often spend a lot of money can not buy the satisfactory products.
How can I buy a high quality vacuum insulation cup? The first thing to look at is the appearance of the Cup.
A look at the inner gall and outer gall surface polishing is uniform and consistent, whether there are bumps and scratches defects;
Two look at the mouth welding is smooth and consistent, this relationship with the feeling of drinking water is comfortable; Three look at the poor quality of plastic parts.
It will not only affect the service life, but also affect the drinking water hygiene; Four see if the internal seal is tight. Whether the screw and cup body fit properly. Spin into the spin out of the ease, whether leaking. Fill it with a glass of water upside down for four, five minutes or a few hard throws to verify that there is a leak. Then look at the insulation performance, this is the main technical indicators of the insulation cup.
General purchase is not possible in accordance with the standard inspection, but can be filled with hot water after the feel, do not heat the cup into hot water two minutes after the cup body will be hot, and the insulation of the lower part of the cup is always cool.