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Photo: PATRICK HERTZOG / Staff (Getty Images) Forget seeing a glass as half-full or half-empty. The best drinking-water-based test of your outlook on life is whether you’re shocked to find out that some bottle water is just tap water, or if you’re so cynical you’d be shocked to find out that any of it isn’t . The truth is, in fact, somewhere in the middle. Back before the explosion in bottled water that happened somewhere around the ’90s, the only reason to put water in a bottle was if something was special about that water. Some of those special kinds of water included: Spring water, derived from a specific place on this earth where water flows from underground to an accessible spot on the surface Mineral water, which is generally spring water from a place with a lot of dissolved minerals in the water Sparkling water, which has bubbles (and which in some cases is also a type of mineral water) Distilled water, which can come from anywhere but the important thing is that it has had its minerals removed Somewhere along the lines, though, the companies that bottle soda and other drinks thought: Hey, why not just bottle some tap water as well? And so they did, and it sold just fine. Because they were correct to notice that most of the time, when somebody drinks a bottle of spring water, it’s not because they care to taste that particular spring . They’re just thirsty and want some […]