Free 28 oz Gatorade Flow Strawberry Splash at 7-Eleven – Download the 7-Eleven app to get a coupon for a free 28 oz Gatorade Flow Strawberry Splash at 7-Eleven. Expires 5/7. Free Airheads Sample at Walmart – Swing by the Freeosk at your local participating Walmart to get a free Airheads sample. Free goodnessknows snack squares at Sam’s Club – Swing by the Freeosk at your local participating Sam’s Club to get