The market on the sale of stainless steel mug variety, price difference is also very large, for some consumers, do not understand its principle, often spent a lot of money can not buy the desirable products.
How can you buy a high quality vacuum flask? The first thing to look at is the appearance of the Cup.
A look at the internal and external surface polishing is uniform, whether there are touch and scratch defects;
Second look at the mouth of the welding is smooth and consistent, this relationship with a drink when the feeling is comfortable; Third, the quality of plastic parts is poor.
Not only affect the service life, but also affect drinking water sanitation; Four see whether the internal seal is strict. Whether the screw Plug and the cup body fit properly. Spin into the spin out whether it is comfortable, whether leakage. Fill a glass of water upside down for four or five minutes or forcibly shake a few to verify if the leak. Then look at the insulation performance, this is the main technical indicators of the cup.
General purchase is not possible in accordance with the standard inspection, but can be filled with hot water after the feel check, not warm cup into the hot water two minutes after the cup body will be hot, and the lower part of the insulation cup is always cool.