Buy any handcrafted cold beverage at Caribou Coffee after 2 pm on Tuesdays and Thursdays in June and get a second one for free!
You just need to mention the offer at participating locations to get the deal.
According to their website, there are 2 locations in the Triangle including:
109 Maynard Road, Cary, NC 27511
3300 Duraleigh Road, Raleigh, NC 27612