Copper is an essential trace mineral necessary for survival. Most of the copper in the body is found in the liver, brain, heart, kidneys and skeletal muscle. Copper helps with the formation of collagen, increases the absorption of iron and plays a role in energy production. Copper is an essential micro nutrient required by our body at a level of about 1mg/day. Though it is a trace amount, it has to come from our food. Although there are several food items containing copper such as whole wheat, beans, green leafy vegetables, honey etc, the best method of meeting the body’s need of copper is by taking water stored overnight in a copper bottle/vessel. Two liters of the water can supply 40% of our daily requirement of copper. When water is stored in a copper vessel for about 16 hours, copper, in very small quantities gets dissolved in water. This process, known in scientific parlance as the “oligodynamic effect” has the power to destroy a wide range of molds, fungi, algae and harmful microbes due to its toxic effects on living cells. The copper content of water which reaches levels of about 190 µg/l is well within the permissible limits set by the World Health Organization and thus remains safe for drinking. After 16 hours, a slight increase in the pH of water from 7.83 to 7.93 occurs in copper pots due to which the taste of water might change a little while the physicochemical parameters remain unchanged.