Starbucks is launching new Trenta 31-ounce cup in May 2011. This will only be offered for iced coffees and iced teas. The largest cup known was the Venti size so this will be a 7-ounce upgrade for iced coffee drinkers and only $.50 more in cost.

Do you think Starbucks will be able to compete with these other brands? Will you buy the Trenta size from Starbucks? Let us know what you think!