I also like the plastic pencil boxes. They are so convenient for carrying my hand stitching quilting supplies. It will hold needles, thread, thimble, pins, small pr scissors, a 3" x 3" quilting ruler, pen/pencil and still have plenty of room for a baggie filled with prepared quilt squares waiting to be sewn.
I have a box for each of my projects. It fits right in my purse so I can just grab one and go. Works great for cross stitch supplies/threads too!