Stainless steel vacuum cup maintenance 

　　Avoid collision and impact in the process of use, so as not to damage the cup body or plastic, resulting in thermal insulation failure or water leakage. Tighten the screw plug with appropriate force, do not over rotation, so as to avoid screw failure. Regular drinking coffee, tea or beverages, the inner tank will discoloration this is a normal phenomenon, toothpaste can be removed with a toothbrush. Long-term use does not need to clean up storage.