The fast food chain is declaring the Square Shakes to be "the world's first shake designed for Instagram." Continuing on that theme, the shakes can only be ordered through Instagram's "Shop Now" geo-targeted sponsored ads by festival attendees on April 16, 2016 at the Base Camp festival grounds.
In addition to being entirely square and in a square cup, the Square Shakes will also come with a square straw and feature square ingredients for toppings. The shakes were created in collaboration with Insta-famous chef Jacques La Merde (AKA Christine Flynn).
You can get an idea of the concept and how the shakes came together below:
Basically, the Square Shakes are meant to help bolster Sonic's Instagram and social media presence while pushing their new Creamery Shakes as the weather warms up.
Photos via Sonic.