Mr. Copper King water bottle and Tumbler is made of pure copper. Drinking water stored in copper bottles is strongly recommended by Science and Ayurveda because water stored in a copper bottle is loaded with anti-oxidants. Just fill this bottle and leave it for minimum 3 hours, best if kept overnight as the water gets copper properties and its benefits during this time. Copper kills undesirable bacteria and germs and gets water charged with the health benefiting qualities of copper. It is recommended to drink the water at room temperature, experts say that drinking from a copper water bottle on a regular basis, especially early in the morning, can make a significant difference to health.