When we changed over to internet service from the cable provider, the new cable modem came in a lovely little box that I immediately scrounged onto for quilt stuff storage. It's nice white cardboard, 9" x 11", and has a flap that locks in place. It has become "Quilt in a box".
Since I'm into making small projects recently, it is just the right size to store all my cut out patches and blocks while I'm working. I use removable tape to affix an EQ drawing of the project on the outside: and store a picture of the block with the patches inside: