Loretta, no I did not know that, glad that you mention it to me. This will be good information for my daughters-in-law since they are starting their sewing "carreer". For myself, I bought over 150 last year and that adds up to the ones I had before, so I think I will just pass on the information to my DIL. Thanks for the tip.

I was so excited about doing just that, and then I discovered my sewing machine doesn't take standard bobbins (perhaps set up so I have to buy special bobbins, perhaps just because it's not an embroidery machine). So I have to get them like $1 a piece and they're not prewound. :(