I came across this through one of the forum that I belong to. Some of you were asking if it was possible to use different brand storage for our Rolling Tote. Thanks to Ellen J. for mentioning this… This is what she had posted. “The 12″ x 12″ Iris cases sold at Michaels do INDEED fit in the rolling tote laying flat OR standing on end. What I do is zip the tote up first, creating a sort of barrel. Then, lay the Iris cases down one on top of the other. I can easily get five Iris cases in the rolling tote this way, perhaps even six! OR, if you stand them on end, what I do is put them in first (3 or 4) and then I can fit a medium to large organizer on top!” Hope this helps you all!!