Sodas are astonishing products. Little more than flavored sugar-water, these drinks cost practically nothing to produce or buy, yet have turned their makers--principally Coca-Cola and PepsiCo--into a multibillion-dollar industry with global recognition, distribution, and political power. Billed as "refreshing," "tasty," "crisp," and "the real thing," sodas also happen to be so well established to contribute to poor dental hygiene, higher calorie intake, obesity, and type-2 diabetes that the first line of defense against any of these conditions is to simply stop drinking them. Habitually...