Any kits I have brought I just keep unused threads on the cards with their numbers as I have a few that aren't mainstream brands available in shops in a plastic sleeve in a folder along with the chart and picture. I have a few odd DMC skeins that I have brought for different projects that until now I have just kept in a small floss bag, but I am about to start a project that has a wopping 86 DMC colours so I brought the box with the bobbins and i will keep it all in there.