I have a sharps bin, and although fairly large (about 2 litres) it's taken only five months to fill because I'm currently on disposable Innolet pens, which each take up about 200-250ml of space.
😱 I know my insulin (Insulatard) is available in 3ml vials for refillable pens (those pens even take the same type of needles as I'm currently using), but I can't be prescribed those because my GP DSN doesn't know the code -- and the hospital team has discharged me for some unfathomable reason.
I tried taking my sharps bin to the pharmacy, and was told that I have to ring a Council number to get it disposed of -- but they didn't know the number.

I'll mention it to the DSN when next I see her, as she it was who gave me the bin in the first place.