While looking for Polaroid film online the other day I saw that some people were selling the empty cartridges. After a quick search I saw that one use for them was photo frames. I opened up my instant cameras and found that I had three empty ones.
I left the inside of the Polaroid cartridge as it was because the metal part does a good job of holding the photograph in place.
The insides of the Instax cartridges only took a minute to pull out and once this was done there was room to store more photo's behind the one on display.
Now a lot of my little photos are organised instead of being stacked in the corner of a drawer.