According to Ayurveda, water stored in a copper vessel has the ability to balance all the three doshas in your body, (vata, kapha and pitta) and it does so by positively charging the water.
"Copper is a mineral that is found throughout the body. It helps your body make red blood cells and keeps nerve cells and your immune system healthy. It also helps form collagen, a key part of bones and connective tissue. Copper may also act as an antioxidant, reducing free radicals that can damage cells and DNA."