The partnership will allow the restaurant chain to serve as sole food partner to the fashion house and offer new treats to guests.
The ice cream cookie sandwiches are available in two varieties at participating drive-ins for a limited time while the Red Bull Slush will be available in Red Bull or Cherry Limeade flavours.
Sonic Drive-In chief marketing officer Lori Abou Habib said: “At Sonic, we’re bringing high energy to Moschino’s famous Desert Party to celebrate summer early, and then extending that special experience to Phoenix and Dallas with some of our latest delicious and most playful creations.
“Our brand personality and passion for innovation directly aligns with Moschino’s, which makes this partnership the perfect kick off to warm, summer days and nights.”
In addition, Sonic will run a 15ft food truck in tow starting from Indio, California, for the annual party and then will visit Phoenix and Dallas.
Last month, the drive-in restaurant added a new limited-time Brunch Burger to its menu available at participating locations across the US.