BALTIMORE _ Starbucks Coffee is working on a way this summer to keep customers' iced coffee cold without becoming watered down.
The Seattle-based coffee chain is testing the viability of coffee ice cubes at shops in Baltimore and St. Louis, a spokeswoman for the company confirmed.
The coffee ice cubes can be added to any iced espresso or brewed coffee drink, but the extra caffeine comes at a cost _ an additional 80 cents.
The cubes, made with Starbucks coffee, are available in about 100 stores between the two markets for the next eight weeks.
