Leave it to Martha to come up with a clever presentation to a classic dip by putting its contents in single-serving jars. Seven Layer Bean Dip is the sort of thing you can't stop eating, so why not give your guests individual servings, enabling them to double-dip to their hearts content? You could use jars, plastic cups, or little, plastic football helmets (if they exist?). If you feel like putting in the extra effort that is.
Otherwise, just plop the whole thing down on a tray.