I have a few old cartridges and sets I can't use and don't want to throw away. I found a company that says they donate some supplies but they won't take items that say Rx only, and of course these items do say that. I plan to call them and ask, but in the mean time I was curious what others do with their old supplies?
I contacted my pump representative and she was able to pass them on to those who were in need. When I moved I had a ton of syringes. I contacted the medical director of the local homeless shelter and had them Fed-Ex'd to the director herself - of course they were in unopened packages.
I donated the cartridges and sets to CR3 Diabetes Association. They have an easy to fill out donation form on their website.