For my first quilling demo, I had wanted to bring along and display business cards so attendees would know where to find more tutorials on my blog. I searched for existing DIY business card holders out there (SVG files for digital cutting machines), but they were either meant for carrying or displaying, not both. So my brain kept at it and here's what I've come up with so far. When it's closed, it's akin to a pack of cards – contained and compact. I made the lid 1/4" shorter so it gives me something to grip when separating the two pieces. Then I simply slide the top upwards (cue Transformers theme music), bend the top backwards, then slide it back down. Ta-dah! It stands by itself! It still needs a bit of work because all I did was reduce the bottom overall. However, that doesn't truly allow for proper paper tolerances, as seen by the bowing along the length and over-snug fit in the depth. I'd like to improve my understanding of proper calculations one ...