Get your free 2-Liter Soda Bottle from Walmart. Score a free 2-liter bottle of soda at Wallmart with the Coupons.com app! Download the app, create an account and tap on ‘Walmart’. Then search at the top right or scroll down to claim the free 2 liter of soda offer. Add the coupon to your account then simply purchase any 2-liter bottle of soda (any brand, max value $2) at Walmart and submit the receipt through the app to get your cash back through PayPal. Request Sample Now!