Plank: Core Workouts You probably already know and love the core-tightening power of the plank. But after countless sweaty holds, the honeymoon phase does fade. Need to spice things up? Just try these seven variations of the move straight from the Women's Health Big Book of Abs. For even more moves, get the Women's Health Big Book of Abs today! What's the difference between distilled water, spring water and purified water? Just a couple years ago, when Hurricane Irene flooded our nearby water purification plant, our tap water was no longer safe for drinking, cooking — basically anything besides showering. And I had a newborn baby in the house drinking a bottle of formula every three hours. Needless to say, I got acquainted with the water sold in the grocery store real fast. And the choices were downright overwhelming. Where were the days of simply picking a few gallons of bottled water off the shelf? I did what any mother would do in my situation: I bought a half dozen gallons of each kind and lugged them all home. The EPA’s website finally answered my questions — after a few quick clicks, I was a water connoisseur. Drinking water — Drinking water is just that: water that is intended for drinking. Distilled water — Distilled water is a type of purified water. Purified water — Purified water is water that comes from any source, but has been purified to remove any chemicals or contaminants.