For storing small parts (especially SMT/SMD components), these little modular boxes are ideal. They have individual clear pop-open covers so you can keep only the ones you want open - less risk of mixing up parts or having a spill. The brilliance of these boxes is that they also snap together, in any configuration you want. You can mix all the sizes to make the ideal box for your needs, and add on more containers as necessary. There's a leaf-spring hinged top that will last much longer than an all-plastic molded top.