This past Saturday was World Card-Making Day, and I hosted a stamp-a-stack. As I was prepping supplies for the event, I kept thinking about how I would package everything securely. And then I remembered that I had a Silhouette cut file for this card holder that's shaped like a mini magazine file. It was quite perfect because it not only held the class supplies, it also came in handy to hold the cards that my friends made that day--with a little extra room for envelopes. I think I'll make these holders for all of my stamp-a-stack events!