No longer are standup flexible pouches a peculiar innovation pictorially featured in packaging and marketing trade magazines. Some 40 years after the original Doypak development by France’s M. Louis Doyen, standup flexible pouches are mainstream—they are the first choice for food and beverage packaging when product development managers, packaging engineers, and marketing executives are seeking sound vehicles for a new product launch. Although they might not fit every new product strategy, they w…