Gorilla Coffee launched Gorilla Cold Brew Pure Black Coffee in shelf-stable, ready-to-drink resealable cartons. The drink blends Rwanda Kigeyo and Brazil Pedra Roxa coffees with water, resulting in a smooth coffee flavor, the company says. An 11-ounce carton holds two servings and retails between $4.00 and $4.25. One serving contains 30 calories.