I go to the local pizza place and they will give me new pizza boxes. I use them to place my quilt blocks in as I finish them. They lay flat and stay clean and it is easy to label the boxes in case I have more than one project going at one time. I get different sized boxes for different sized blocks. They stack neatly and fit where I need them to. I make a sandwich of two pieces of cardboard and the rotary blade and wrap it up well with duct tape and throw it in the trash.