If the person wants the Dunkin Donuts gift card for the coffee, not the donuts (as is the case with me

), you could do a coffee/caffeine themed gift. Maybe get a bag or tube of chocolate-covered coffee beans and put "In Case of Emergency, Break Seal and Eat..." or something like that. Maybe you have or can get the free sample bag of Dunkin Donuts coffee that's been offered recently and can use that. Some stores also sell a little foil sealed packet for about $1.
I do coffee-themed care packages a lot and am usually trying to get a smile with them, so I often included a nicely printed up version of something like:
Are You A Coffee-Addict? or
You Know You’ve Had Too Much Caffeine When… or an image from:
coffee addict - Google Image Search just for fun.
HTH,
cj/