The demand for new functional beverages has seen tremendous growth over the past several years. The number of new energy drink introductions, for example, increased from 6 in 2000 to 239 in 2006, according to Mintel GNPD. And taste preference has become a more-significant issue. Initially, health and wellness consumers were willing to forgo taste in exchange for the health benefits offered by these products. Now that such products have reached the mainstream, functional beverage manufacturers ha…