Free birthday shake
At Shake Shack
Shack App members who add their birthday and opt in to marketing emails get a free regular shake for their birthday.
Conditions: Free Shake Shack account. Add your birthday in Settings on the Shack App or website and opt in to marketing emails. It can take up to 24 hours for your birthday to register. The code is emailed for your birthday and is valid for 30 days on orders placed in the Shack App or on shakeshack.com at participating US Shacks, excluding airports, stadiums and ballparks. It can't be used for in-store, drive-thru or third-party delivery orders. Regular shakes only, up to $6.99 off. Limited-time shakes and paid add-ons such as whipped cream and malt are excluded. Sign in to your account and enter the code in capital letters at checkout. One use per order.