This is a simple stackable design for a wire spooler. In this case, it was developped to hold electrode leads for medical equipment, but it can be used for headphones or anything else. The design allows for a single pass printing (with supports), or for a nicer smoother finish, it can be printed in two parts and crazy glued.

However, the main use of this design was that the main part (named bottom in the files) can be glued in stacks to accommodate sets of wires. Ex. we keep 4 leads together for a specific procedure. The end can be capped flush (with the top), or you can keep a handle for ease of use by using only bottoms.