Car / bike valve cap (progressive thread)

Customizable car / bike tire valve (Schrader) cap with thread. The thread starts from the middle so you don't need to make so many turns and it's easier to put on. There's an extra space for a tip.

Print instructions

Any filament works but use black (dark) color to avoid fast degradation by UV light. Or use ASA. Print it on the bottom (or top), no supports needed (in both cases).