Of the top-selling still water brands, Fiji, Deer Park and Poland Spring come from natural aquifers or springs. Purified waters are usually, but not always, sourced from municipal water (aka tap water). Distilled water doesn’t taste pleasant and can feel drying rather than hydrating, so most purified waters are remineralized for flavor. Dasani’s label lists purified water, magnesium sulfate and potassium chloride, noting “minerals added for taste.” Natural bottled waters come from springs, artesian aquifers, wells and other sources — filtered and disinfected to some extent, but without added minerals.