Starbucks is offering a 31-ounce cup of iced coffee or tea in Phoenix and Tampa. The move is likely another step in the competition between McDonald's and Starbucks—McDonald's sells 32-ounce sweet teas in Southern markets, and recently started offering espresso. The new Starbucks size is called "Trenta." An iced coffee in that size costs $3.30 and an iced tea $2.60, Reuters reports.
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