For a limited time, SONIC is giving away one free any-size Coca-Cola, Diet Coke, or Coke Zero Sugar with any purchase! Enjoy your favorite drink your way, with unlimited add-ins and modifiers.

You can claim a free drink once per day, every day, through December 28th. Simply order through the SONIC App or online as a registered user. Don’t miss this chance to sip for free all season long!