…that packaging, which makes having a Mast Brothers Chocolate bar not unlike unwrapping a gift. The hefty paper with its fanciful designs has attracted as much a following as their dark chocolate itself. Its designer, Nathan Warkentin, a 33-year-old former menswear designer, tries to evoke an individual abstract palate alluding to the chocolate bar’s country of origin. The design of the sea-salt bar, which contains sea salts from Maine, speaks to American ties and pocket squares with its preppy pale-blue stripes. But that’s one of the more obvious. “They’re all very abstract,” says Warkentin, who cites Franz Kline, Ettore Sottsass, and various couture houses as occasional inspirations. “It spins around in my head—and comes out like this.”