The summer menu will be available nationwide beginning June 1.

The colorful frozen favorite is returning with collectible cups inspired by U.S. landmarks and two additional tropical treats ...

The red, white and blue drink comes in limited-edition cups featuring designs inspired by U.S. landmarks, timed to coincide with America’s 250th anniversary.

Credit: Allrecipes / Sonic Today marks the unofficial kickoff for summer, and that means one thing: It's Slush Season, y'all.

Longer days, hotter temps and cravings for something cold (or bold) can only mean one thing: Summer at SONIC is here.

Sonic's Red, White, and Blue Slush Float is back for summer with a special update. In honor of America's 250th birthday, the ...

Sonic Drive-In teamed up with Red Bull again to launch something special and keep guests refreshed all summer as temperatures climb: the new Red Bull Summer Edition Watermelon Slush and the return of ...

Sonic Drive-In and Red Bull are back for the Summertime with the fan-favorite Red Bull Slushes collaboration, including a new vitalizing Red Bull Summer Edition Dragon Fruit Slush and the return of ...

Sonic Drive-In's Summer of Shakes promotion has been brought back this year, and now also includes 25 slush flavors. According to a press release, new slush flavors include Blue Raspberry made with ...