There are a number of in-game items that are a part of this advertising campaign.
Dunkin' Donuts Backpack Items
Below are Backpack Items that you can receive from Dunkin' Donuts. Only two of these items are available to collect at a given time, but the game often cycles through these items over several weeks.
Special OffersDunkin' Donuts Lawn Chair was available on the Dunkin' Donuts Fan Site. It is free but you must first like the Dunkin' Donuts site, then click the link on the site in order to receive it.
You can find the site at: Dunkin' Donuts Lawn Chair