Your morning coffee is becoming optional at Starbucks

Starbucks is quietly becoming an energy drink company as it rolls out an expanded "Refreshers" menu, with customizable caffeine levels. Beata Zawrzel/NurPhoto via Getty Images Starbucks is pushing customizable caffeine beyond coffee with its new Energy Refreshers line. The launch is part of a broader industry trend toward customizable functional beverages. Starbucks reported strong Q2 earnings, signaling its strategy is building momentum. Starbucks may be fueled by its coffee sales — but th...