QuikTrip is offering a FREE Self-Serve Drink with the new coupon available in the mobile app. If you don't have the app, click here to download it then sign in to view the coupon. Click "Redeem" when you're at the store then have the cashier scan the barcode to redeem. Limit 1 per customer. Offer expires on 5/9. Click here for the QT store locator.