I have a special box that hold about 20 bobbins. I have a husqvarna so it has little bobbins. Inside the box is an apperture which is exactly the same size as the bobbins so they don't roll around. I also have some little pink collars which you canslide onto the bobbins which keep the thread in place and stop them unravelling.
I purchased these from world of sewing in Tunbridge wells. They have a web site and you can order over the phone and tehy will post.
I do like neat storage.