But Scott Wiener, a pizza-box collector and author of "Viva la Pizza!: The Art of the Pizza Box," says it's potentially significant for a giant like Pizza Hut to start using a 2.0-style box.

Pizza Hut is trying out a new round design. Washington Post photo by Emily Heil. Consider the pizza box. Not a specific pizza box, because they all pretty much look the same, but all the pizza ...