Classic Industries chrome fuel tank cap warning.

Same for the AMD made oil filler cap that I got from Classic. Part with the ears falls off the cap and falls into the valve cover - YIKES!!!This happened to me driving down the road and fortunately the piece got hung up behind the springs. I got home and no filler cap, thought I had spaced it when topping off the oil, I just happened to look in the opening with the light just right when I put another cap on and saw the piece stuck in the head.