some go in large Ziplocks and my most current-yes I am GOING to work on them- projects go in Iris scrapbooking boxes. I get them in Michaels on sale..usually for about $4 each. I found them at Costco recently in a bundle in an assortment of colors. I have started making a copy of the pattern (just for my own use and shredded when finished) so I don't have to store the whole book or have to search madly when I want to start up on that project again.