Since I am buying blades by the 100 Box I needed a safe way to store spent blades for disposal. I didn't like the old soup can sitting out and didn't like the commercial ones. I wanted one I could toss in my drawer for later disposal. Since I'm getting a bit older I had a lot of old Rx Bottles around with child proof lids. You could add a drop of super glue to the bottle threads to permanently close the lid.