Superior Threads is often asked if you can recycle empty spools or thread cones. Here is their answer:
We love that our customers are thinking about saving waste and possible reuse. If we don’t take care of what we have now, what will the future generations be left with? We are happy to answer, if the recycle center takes “polypropylene” or “PP” plastics, they can be recycled. Some centers don’t recycle polypropylene, so we recommend calling ahead to confirm with them before you send them in.
The shrink wrap packaging is made out of “polyethylene terephthalate” or PET for short. This is what water bottles are made out of and can also be recycled.
Want to see how people "re-purpose" their cones and spools, click here.