Pizza boxes work real well too. I will admit these look prettier, but the price is right on the pizza boxes.
What do they charge you for them? you can make them look pretty with a strip of fabric across the front!
i use the ones pictured in the first post..and i used a label maker to mark them, they are stacked nice and neat on the floor. i love them. i have a few with handles that i take with me to class.