Vacuum cup selection method 

　　Want to see the appearance of the cup above all: the surface polishing that sees inside bravery and outside bravery is uniform and consistent, whether to have bruise and scratch blemish

　　Two to see whether the mouth welding is smooth and consistent, this relationship when drinking water to feel comfortable;

　　Three plastic parts of poor quality. Not only will affect the service life, will also affect drinking water sanitation;

　　Four see whether the internal seal is tight. Whether the screw plug and cup body fit well. Whether the rotation in and out freely, whether water leakage. Fill a cup of water and turn it upside down for four or five minutes or shake it hard enough to check for leaks. Heat preservation performance, this is the main technical indicators of vacuum cup. It is impossible to check according to the standard when general choose and buy, but can fill hot water hind check by feel, the cup that does not heat preservation is loaded hot water two minutes later cup body lower part is met calorific, and of the cup lower part that heat preservation is cool from beginning to end.