I have never seen Sky Flakes before, but I do love the way they come. I have some friends who come to AZ each year, I know what I will be asking them to bring this year.
As for my blocks, I use pizza boxes. They come in different sizes, and I can stack them on a shelf. I also put painters tape on the end and I wright what color is inside or the name of the blocks inside. Also makes taking blocks to and from class easy.