What would happen if you started drinking from a copper cup every morning? It might not seem like a big change, but the effects are surprisingly powerful. When you leave clean water in a pure copper cup overnight, copper ions infuse into the water — and those ions are incredibly powerful. They kill harmful bacteria like E. coli and Salmonella, making the water naturally purified, without any chemicals. Those same copper ions also help boost your immune system, improve digestion by supporting gut