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To celebrate the 30th anniversary of Metrobus, the Washington Metropolitan Area Transit Authority has issued a line of commemorative items, available through its online gift shop. Among the highlights: the $12.45 “Anniversary Desk Mug,” an insulated stainless-steel number decorated with bus pictures and topped with a spill-resistant lid. Just don’t sip from it on an actual Metrobus. Like other Metro-brand drinkware, including the “Metro Commuter Mug” and the “Stainless Steel Travel Mug,” the vessel offers no immunity from Metro’s food-and-drink ban. “The coffee mugs are sold as souvenirs,” says Metro spokesperson Steven Taubenkibel. “The majority of people who buy them are employees—for their work locations, offices—and also tourists.” The mugs aren’t completely useless to commuters, though. “You can carry the mugs and other coffee cups,” Taubenkibel says. “But you’re not allowed to drink out of them.” —Sarah Godfrey