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. Since February, the smoothie chain has introduced its JavaFit coffee line to 18 units, with three stores debuting the nutrient-enhanced coffee product this week. The JavaFit line features four different types of drip-coffee products that are nutrients enhanced, including the Diet, Energy ...

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