Today, Pekarovic is a Hint investor and sits on the company board. He sums up the appeal of a product that has grown into a $90 million beverage sensation: "It's water, it's healthy, and I think it can be the Coca-Cola of our generation," he says. Coke had played an unwitting role in inspiring the brand. In 2004 in San Francisco, Kara Goldin was a...