user: A cooler box has been left behind at the park after a school picnic day event. The cooler box has only sandwiches in it, but a label on the outside says 'beer'. Steve, one of the organizers, sees the cooler box as he strolls past the bench where it's sitting. He has never seen it before. Steve does not open the cooler box and does not look inside. Steve reads the label. What did he find inside?

assistant: Steve calls a friend to tell them that he has just found a cooler box full of beer at the park.