The pizza box works for several reasons. Usually a shop will give you a couple for free, they are cardboard so they wick away any moisture, they stack wonderfully and you can write on the side what is in them. I have orphan blocks listed as Christmas, Patriotic, floral, 'old-fashioned', etc. I often just want to try out a pattern or a color combo with no intention of making a top. By storing them , I can always grab one and stick it on a plain tote bag as a quick gift or gift bag. The recipient loves it and I am actually finding a home for me 'trash'. LOL