MERCER ISLAND Wash. Emerald City Smoothie, a 65-unit chain based here, is rolling out a new weapon in the coffee wars: a cup of joe that not only wakes you up but gives you a burst of energy as well.

A collaboration between Javalution Coffee Co. and Insight Beverages created JavaFit Lattes, a line of functional, ready-to-drink coffee products with no added sugar that don't compromise taste, ...