(Question) Multiple spools with filament still on them. Can I connect these together to make a full spool?

So I have like 20 spools, each with at least 10 meters of filament still on them. I always end up printing things that need more so the spool goes to the pile as I load in a new one.Can I join these ends together somehow so I can spool everything together and not waste it? (Abs btw) http://ift.tt/2bYl856