Spring Water:  Flows naturally from underground to the surface.
Mineral Water:  Contains sodium and calcium and sometimes other trace minerals.
Drinking Water:  Tap Water that has been cleaned further and bottled.
Distilled Water:  Has no minerals, which is actually not a good thing.  Distilled water is “hungry” water, chemically, and can actually strip your body of certain nutrients as it is absorbed and processed.
Reverse Osmosis Water:  Mimics the body’s own filtration, which is a good thing.
Sparkling Water:  One of the above, only carbonated.