And sometimes, even if it seems like an easy reload, it just doesn't work.
Around 7 or 8 years ago, I had bought a Fuji Panoramic Disposable. I was planning on refilling it with T-Max.
Was I surprised when I found out it couldn't be done!
I don't know if the Fuji disposable cameras still work the same way but in the model I had bought, the film advance was done using an undulating (toothed, corrugated, whatever you might call it) spool, not a fork like driver like all cameras. The film canister was a special design in that regard. When you put a regular film in, it would just slip and not fit properly. The only solution a thought of was cutting the spool with a saw and crazy glue it to the camera...