The silicone wire spool sets on eBay, AliExpress etc come in cardboard boxes, they work but collapse over time. Simple, stackable boxes with internal supports for the small, wooden dowel spindle and chamfered holes to feed the wire. 

Print the bottom box with a flat base, other boxes with a stackable base, then a lid for the top-most box.

Supports required for the base of the stackable boxes (ie any box not on the bottom).

Design files available to view and copy in onshape.com - [https://cad.onshape.com/documents/3405e6d99ed0d8ee3da776c1/w/44312fb9895b4af3aaee195f/e/4ad78240a5efd80fe6c9be2f](https://cad.onshape.com/documents/3405e6d99ed0d8ee3da776c1/w/44312fb9895b4af3aaee195f/e/4ad78240a5efd80fe6c9be2f)