Is your company bottling grape juice? If not, it might be a good idea to add this beverage to your filling lines. Here’s why: Sales of the drink, measured in dollars, increased 345%, unit sales increased 178% and the average unit price increased $1.16 to $3.09. Clearly, the purple beverage is a superstar, according to 52-week data provided by Chicago-based market researcher SymphonyIRI Group.