The following disease might be prevented by not sharing a water bottle: cold sores . Sharing the same water bottle can lead to catching diseases or other sicknesses that can be transmitted via saliva.
Infections that can spread via oral transmission are : mononucleosis caused by Epstein-Barr virus (EBV), and cytomegalovirus (CMV), strep throat, the common cold, but also meningitis for example.
