Shake Shack: Get a Free Burger
Shake Shack is offering Buy One Get One Free Burger or $6 Off Any $10 Order with the coupon. Coupon expires 1/2/2019.
Note: Offer is available for one-time use only until 1/2/2019. iOS or Android device required. Excludes locations at airports, ballparks and stadiums. Max savings of $6.