Last Easter weekend, when families came into town and everyone seemed to be out at brunch, I strolled down to the Dunkin’ Donuts on 100th and Broadway for an iced coffee, passing three Starbucks on the way. I always order my iced coffees with a coconut flavor shot because it tastes a bit like sunscreen, the spray kind that also moisturizes. I brought the coffee back to campus and kept the cup for a week after, washing it out so that I could drink water from it...