I now have a sharps container, you can get it from several pin suppliers, when its full you can take it to the local hospital and they take mine no questions asked, but I have a script for TRT and then its just slin pins...
Or before that I used to fill big liquid detergent bottles, when you couldnt get anymore pins in them, buy some of that expanding foam from lowes and fill it up and then glue the cap on so kids cant get it in and its solid and sealed...