Hello, I can't remember where the idea originally came from. It works really well keeping my filled bobbins tidy with no unravelled threads getting in a tangle.
I use clear soft tubing from the hardware store (clear so as to see through to the colour cotton on the bobbin) 5/8" inch in diameter. With the scissors I cut a few pieces 1/4" off the tubing and store .Put a cut in each piece to be able to open around the bobbin keeping the loose end tidy . Jen.