If you have access to a 3d printer, they become infinitely more useful. There are hundreds or possibly even thousands of printable accessories available on site

If you have access to a 3d printer, they become infinitely more useful. There are hundreds or possibly even thousands of printable accessories available on sites like Printable and Thingiverse. I use a few of the ikea ones like the little bins for pens (with a 3d printed divider), but the majority are 3d printed.