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UPDATE: You can also get a free shake by texting DEALS to 876642
Hurry, Sonic Drive-In is currently offering a FREE Slush to all new users that download the free Sonic Drive-In app! No purchase is required. Simply download the Sonic Drive-In app for IOS or Android and set up your account.
Once you set up your account, the offer should show up immediately. To claim your FREE Slush, click on ‘Redeem’ and show the coupon to the carhop at any participating Sonic Drive-In!
So good, they’re famous. That’s probably all you need to know. Oh, and they’re only at SONIC.