I use a container such as Berocca tablets come in
Remove the silica gel desiccant from the inside of the cap (good to mix into potting soil)and cut or drill a hole in the cap.
Sinker prongs can be folded and sinker easily stuffed into container arse-first.
Then simply put stem through hole in cap and replace cap on container
Saves getting the prongs caught up inside your tackle bag, stabbing your hand and more importantly, allows you to carry more gear in your tackle bag/box