This is a retainer that I made and printed in flexible filament (Ninjaflex) that will hold the new iPad Pro Pencil adapter that is a female to female lightning port adapter to the end of a Lightning charger cable. The adapter Apple came out with to charge the Pencil with a cable is so small and easy to loose. This keeps it where it needs to be when you need to charge the Pencil (when not charging through the iPad port directly).
Use only one shell because of the part size or it may not get filled. Use a flexible filament like NinjaFlex.
The part should fit snuggly on the Pencil Lightning Adapter and the end of the iPad Pro cable.