There is a risk of contracting novel coronavirus pneumonia by drinking water that has been drunk by someone else. First of all, the main source of new coronavirus pneumonia is confirmed cases of new coronavirus pneumonia and asymptomatic infected people, and new coronavirus pneumonia can be transmitted mainly through respiratory droplets and close contact, in which there is a possibility of infection by contact with objects contaminated with the infectious virus. Therefore, susceptible people may become infected when they come into contact with water or cups that have been contaminated by confirmed cases of NCP and asymptomatic infected persons. However, the activity, virulence, and amount of virus remaining in the water source or cups from the infectious agent should be considered to determine whether infection can occur. When the virulence of the new coronavirus is strong, the number of viruses is large and the immunity of susceptible people is low, the risk of infection is high; however, if the virulence of the virus is weak, the number of viruses is small and the immunity of susceptible people is strong, the risk of infection is not easy. During an outbreak, it is recommended to pay attention to water hygiene and avoid sharing cups or water sources to minimize the risk of infection. Tips] In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.