I bought a perfect storage container to hold all my sewing machine feet and accessories for $3.99 at HF. It has 24 compartments that work really well for machine accessories with removable partitions so I have room for big things like my buttonhole foot and couching guides.
Dollar Tree has really nice small plastic storage box in their tools for holding small items like embellishments. Of course, it's only $1. I have several of these boxes that I use for resin crystals and other findings. They stack flat and don't take up much space.