Memory stick cap
I still have the cap of my USB memory stick. But I will probably lose it quite soon.
At least since the Duofold from 1921, pen caps have been parked at the other end of the pen when not in use.
Moving that idea to the memory stick should be quite a nobrainer? Or is someone sitting on a U.S.patent for "Structural adaption of electronic computer memory stick to prevent accidential loss of protective connector cover"?