This is a spool holder/dispenser for copper foil tape that is typically used in making staind glass. It was written in OpenSCAD to allow for easy modification to fit any size spools you may have - copper or otherwise - typically useful for spools holding materials that do not have adhesive (and so have difficulty staying on the spool). 

The default parameters are to fit the copper spool I had available – 5mm wide copper foil, ~133mm in diameter (outer diameter), inner diameter of ~77mm (spool pictured). I have included the STLs of that in case folks can't or don't want to install OpenSCAD to generate their own.