Everyone will surely be buzzin’ on National Coffee Day. To help stir things up, Krispy Kreme is offering a FREE 12-ounce cup of coffee to customers on Monday, Sept. 29 — no purchase necessary. Limit one offer per customer, per visit. For $1, you can also get any 12-oz. mocha, latte or iced coffee, including its seasonal pumpkin spice latte. For locations nationwide, click here.