BYOC

n a Monday morning in downtown San Francisco, the Blue Bottle on Second Street, like all Blue Bottles (and Starbucks and Peet’s and Dunkin’ and independent coffee shops everywhere), is packed. People sitting at blond-wood counters with coffee in paper cups capped with plastic lids, even though ceramic for-here cups are available. People standing in line empty-handed, waiting to pick up paper cups capped with plastic lids. People walking out the door—myself included—clutching paper cups capped with plastic lids, headed to meetings, to the bus, to stare into