I have tons of this that I was given years ago, and many that I acquired for less than $2 a 6000 yd cone. I use it in my serger and my Babylocks. The ones I have have the original plastic bags on them and are stored in plastic tote and in my cabinets. Before I use them I first take a vacuum to them, then unwind the top layer or two. Then take them outside and use a can of air on them.