Starbucks Coffee Co. said Wednesday it will debut a new line of caffeinated fruit drinks called Starbucks Refreshers, which will be available in cans and in customizable blends in the chain’s coffeehouse locations.

The plans mark the company’s move into the $8 billion energy drink category.

The launch of customizable Frappuccinos and sales of Via instant coffee and Seattle’s Best Coffee helped boost Starbucks Corp.’s third-quarter performance, continuing the turnaround that began a year ago, the company said Wednesday.

After reporting a 37-percent increase in profit, Seattle-based Starbucks chief executive Howard Schultz increased the company’s outlook for the rest of the year and into 2011.