For a limited time, get a Free 20 oz. Pepsi, Mtn Dew, Starry or Mug Root Beer at Circle K! Click the link for the coupon. Limit 1 code/customer. Offer not valid w/ other offers, rewards, discounts, coupons or promotions. While supplies last. Valid only in-person at participating Circle K Convenience Stores in the United States; not available in NE, UT, WI, Puerto Rico, or the U.S. Virgin Islands.