But according to a Food & Wine review, it's anything but sour. In fact, the reviewer criticizes it for being too sugary.
"You won't understand why, but you'll keep going back for more sips, likely until it's all gone. Our only gripe is that the slush is a bit too sweet, as if overcorrecting for the acidity, but maybe this is what has to happen for America to acclimate to - and embrace - pickle-flavored soft drink," the reviewer wrote.
Sonic did not immediately respond to Business Insider's request for comment or confirm the exact ingredients in the drink.
The initial reaction on social media was one of confusion:
However, some customers are looking forward to this unusual combination and making jokes about other merchandise Sonic should offer:
The Pickle Juice Slush is joined by three other new summer flavors, which will be available at participating Sonic restaurants for a limited time: Bahama Mama, Blue Hawaiian, and Tiger's Blood.
Stop trying to make Pickle Juice Slush happen! https://t.co/81YaGat2XW- ⓜⓘⓐ ⓦⓐⓛⓛⓐⓒⓔ (@Grunge_Girl7) June 11, 2018
OMG....I Just Cant Dill with this. "Pickle Juice Slush" pic.twitter.com/Jmfh0GCtVH- unknown poolguy (@UnknownPoolGuy) June 11, 2018
Seriously, a Pickle Juice Slush??? Just throw the whole Sonic franchise away pic.twitter.com/KH6Td6TEI1- Shashana (@Shashana80sKid) June 11, 2018