Originally Posted by flyzabit

This worked for me. After entering, you will need to close the Enter Codes sub-window. The bonus offer screen will pop up. Accept it, and then "Get it" on the right side of that screen.
It will ask for a verification of your address info, and have you input your phone number (which is probably why they are doing this, in case they need to call on something...or add to their database).

Still, it is a free Coke (and my local mini-mart takes it to mean Diet Coke and all the Coke varieties).