Another photography related gadget. Historically I used only my Nikon DSLR an in all the years I used it I never lost a lens cap.
Since switching to the Olympus Pen-F I have lost three lens caps in 6 months. Rather than continually buy new lens caps I went for a lens cap keeper. It detracts a bit from the looks of the camera, and I’m not keen on having the cap swinging around but ……
Basically there is a circular disk that is permanently stuck on your lens cap and an elasticated loop that you can attach to something. I have it attached to the camera strap loop but I suppose you could put it around your wrist etc (if you remember).