“Science has now confirmed that water rested in copper overnight is the purest water in the world and can even contain an electrical charge”

On the antimicrobial element, real peer-reviewed evidence exists. In the 2012 study, researchers deliberately contaminated groundwater with cholera, Shigella, Salmonella and E. coli, then stored it in copper pots. Ayurveda recommends the use of copper for storing drinking-water, and the study evaluated the effect of a copper pot on microbially-contaminated drinking-water, testing Vibrio cholerae O1, Shigella flexneri 2a, enterotoxigenic Escherichia coli, enteropathogenic E. coli, Salmonella enterica Typhi and Salmonella Paratyphi. When drinking-water with pH 7.83 contaminated with 500 CFU/mL of those bacteria was stored in copper pots for 16 hours at room temperature, no bacteria could be recovered on the culture medium. A separate study using a home copper device reported that water inoculated with 500 to 1000 colony forming units per mL of E. coli, Salmonella Typhi and Vibrio cholerae was stored overnight at room temperature in copper pots or glass bottles with a copper coil, and the organisms were no longer recoverable when cultured on conventional media, by contrast with water stored in control glass bottles. A third study adds an important caveat the viral framing omits. That study confirmed for the first time that these bacterial pathogens are inactivated by storage in a copper vessel within 24 hours, but also demonstrated that it is necessary to account for short-term sub-lethal injury, manifest as ROS-sensitivity, in order to more fully understand the process, which has practical implications for the time required to store water in a copper vessel to completely inactivate these bacteria. In other words, bacteria can be injured but not yet dead at shorter intervals. On "purest water in the world," I found no scientific source making or supporting this superlative, and no study framing copper-stored water as the purest water. The claim is also contradicted by the chemistry of what copper storage does: it adds dissolved copper to the water. Research cited in the literature notes that the time required for effective leaching of copper into water stored in a copper vessel is greater than 12 hours. By any analytical definition of water purity, adding a dissolved metal reduces purity rather than increasing it. On the electrical charge, the physics directly contradicts the claim. Pure water is actually an excellent insulator and does not conduct electricity, and you will not find any pure water in nature. Conductivity in water comes from dissolved ions, not from a stored charge. Liquid water is not an electrical insulator and hence not a dielectric; the self-ionization of water, in which a small proportion of water molecules dissociate into positive and negative ions, is the process that gives pure liquid water its inherent electrical conductivity. Water containing copper ions remains electrically neutral overall: equal positive and negative charge. A peer-reviewed review of similar wellness water marketing addressed this category of claim directly, noting that promoters invoked things like a semi-stable "structured water", electrically charged water, charged minerals, electrons, or the presence of negatively charged hydroxide ions, and concluding that from a chemistry perspective, none of these claims were even logically feasible as they were refuted by basic physical and chemical principles.