If it were a car it would be a Rolls Royce. If it were a home it would be a mansion. If it were an athlete it would be Tom Brady. They’re all expensive, well made and known for excellence. But this is not a car, home or sports figure, it’s a brown paper bag. It could be the priciest paper bag in the world. High-end designer Jil Sanders has crafted a brown paper bag that seems to be a hit, despite its cost.