With VOW you can now order edding's free return box to recycle any brand of empty pens or markers.??As part of edding's product responsibility, the return box scheme offers companies, authorities, schools and educational institutions a unique opportunity to recycle??any brand of empty pen or marker. Recycling is an important part of sustainable action. Simply return your empty or old markers in the box, and the markers will be recycled back into the production of the edding EcoLine range.