I use the Plano double sided fishing lure boxes for my bobbins; no more spilled or misplaced bobbins. My collection of machines of course don't use the same type of bobbins, its an easy way to keep them separated. I buy them at Wal-Mart.
here's a link for them:
http://www.walmart.com/ip/Plano-Doub...nizer/16351086