I use the Rubbermaid (I think) boxes that are meant to take a 9x13 cake or cupcakes. I started using these when I travel to retreats. 6 of them (I think it's 6) fit into the GIANT boat tote from Land's End. When the project out grows that box, then I tend to also use the reusable grocery totes. I agree with everyone, if you don't want to accidently use that yardage, you MUST isolate it from your stash.