The Wall Street Journal reports that sales of Coke and Pepsi and other top brands slipped last year by a percentage point or two. They can’t keep up in the face of rising commodity costs, prices, and the popularity of vitamin waters and sports drinks. The drop might seem like a blip but these companies have stockholders to please and are supposed to be growing and increasing their sales every quarter. So it’s no surprise that the WSJ is taking such a hard look at the declining bottom lines. Expect to see even more production of functional drinks, sweetened and not, and at higher prices, of course.