The Blackout Slush Float hits the Sonic menu on March 25 and will be available until May 5. While the glasses are included for free with the purchase of the drink, they are only up for grabs while ...

And yes, they're included (as long as supplies last) with the slush, which we're told will be available at participating locations through June, starting at $3.99 (prices may vary).

The slush is available on the Sonic app right now. But if you want it bundled with one of the straws, you’ll have to head there on May 5 to snag one while supplies last.

Sonic announced the new Strawberry Mangonada Slush will join the menu starting Monday for a limited time. The drink features strawberries, mangonada syrup and a dash of Tajín for $2.99.

Sonic is helping celebrate next month’s eclipse with a limited-time drink. >> Read more trending news The drive-in fast food restaurant has developed the Blackout Slush Float to coincide with ...