Check out this freebie from Caribou Coffee! Today in honor of Cinco de Mayo, they are celebrating Free Drink-O de Mayo! Get free samples of their new Caribou Coolers from 3 to 5 pm! You can try all three of the new Cooler flavors — Salted Caramel, Mint Chocolate, and Raspberry- for free. This offer is valid in-store only, so find the location nearest you and score this deal!