How Can I Buy A High-quality Vacuum Cup?
May 05, 2021
The first thing to look at is the appearance of the cup. Check whether the surface of the inner tank and the outer tank are uniformly polished, and whether there are bruises and scratches.
Second, see whether the mouth welding is smooth and consistent, which is related to whether the feeling of drinking water is comfortable.
Third, look at the poor quality of plastic parts. Not only will it affect the service life, it will also affect the sanitation of drinking water.
Fourth, see if the internal seal is tight. Whether the screw plug and the cup body fit properly. Whether it is easy to rotate in and out, and whether it is leaking. Fill a glass of water upside down for four or five minutes or shake it vigorously to verify that there is no leak. Look at the thermal insulation performance, this is the main technical index of the vacuum flask. Generally, it is impossible to check according to the standard when purchasing, but you can check it by hand after filling it with hot water. The lower part of the cup body will heat up two minutes after the non-insulated cup is filled with hot water, while the lower part of the insulated cup is always cool.
