In these times of limiting physical contact due to the coronavirus, Uber Eats and Shake Shack are looking to promote alternatives to handshakes.

The food delivery platform and the master of milkshakes have teamed up for a unique deal. Starting on Tuesday, August 18 and lasting until Sunday, August 23, all shakes from Shake Shack will be buy one, get one when ordered exclusively through Uber Eats.

The shakes are available in seven flavors, including Salted Caramel and Chocolate.

Additionally, Uber Eats is kicking off the Shake Shake TikTok challenge where duets will be ditching the handshake greeting in favor of sharing a milkshake with a friend. To celebrate Shake Shake, the new way to greet friends, TikTok duos such as Dixie Damelio and Mark D’Amelio, Caleb Natale and Sean Sotaridona, and Spencer and Jon Klaasen are joining in on the fun and kicking off the Shake Shake TikTok Challenge.