Don't want to see any pins wash up near the beach here so I'd figure I would post some ideas on how to get rid of used pins.. Individual: Place plastic tip onto the end of the pin and unscrew it from the plunger. Place both pieces into an empty soda can. Then crush it and dispose in garbage or dumpster away from your residence. Bulk: Place plastic tip onto the end of the pin and unscrew it from the plunger. Place both pieces into an empty bleach jug (place cap back onto jug) and dispose into a dumpster away from your residence. Or if you feel brave enough to deposit them at your local needle exchange program you can do that as well. Anyone else feel free to add their process.