Register for a FREE account on the Sonic Drive-In App (available on the App Store or Google Play – make sure to enter your birthdate) to score a coupon for FREE Small Classic Shake! This will be valid on your birthday for up to 30 days from the date of issue! If you’re interested, get your coupon now!
To score FREE Small Classic Shake at Sonic Drive-In, ↓↓ click on the link below.
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