As Larry suggested, I use them for transporting a few flies from one place to another. I also use them for staging tying materials on my bench when I am tying a dozen flies of one type. I will prepare all the hooks an put in one of those little boxes, prepare some materials and put in another box. It allows me to keep all the materials close at hand without having to go back to the larger storage bins. I usually keep a few of them on my bench just for short term storage.

Ted