Persian records mention the practice of keeping water in silver vessels.
The ancient Babylonian and Greek civilizations were aware of silvers ability to disinfect. Colloidal Silver was used as a remedy as far back as ancient Egypt. It continued to be used in the Middle Ages to treat wounds. The Romans reported the use of silver compounds for medical treatment. Before the days of refrigeration, silverware or a silver coin was kept in the drinking water and the milk to prevent spoilage.