My to-go sewing room is an 8x10 zippered fabric make-up travel case with dividers (zipper closed of course) and it also has a handle. I found it at Goodwill for $4. I can open it up on a flat surface or hold it on my lap. Either one is really convenient.
It is perfect for the hexies that I make when I am waiting (doctor's office, watching kids at park, etc). It has a total of 4 sections that are great for dividing my tools, fabric squares, finished hexies and those in progress.