Created out of necessity after finding multiple forgotten about gift cards, this slider box holds approximately 8 gift cards. I would think that increasing z access for a few more cards may work. I may add the blend file in the future. Initial print was PLA black and then I realized after printing the letters were in reverse.. duh. Next print I used PET Maroon but printed at the same PLA temp. I tried a higher temp print with PET and seemed to get more curl so went back to PLA temp settings. Images are printed at default PLA with low resolution. I may need to add some width to the side rails but seems to work and slide well. Since it is thinner, it would not make a good pocket carrier since the slider lid will probably come off. I designed it for putting on my sun visor, so I will probably update soon with a visor clip.
This was printed at the default settings. Printed both PLA black and PET Maroon and used the same settings for both. Example image is PLA Black and PET Maroon with standard PLA settings. I did not increase temp settings for PET and it printed fine.
Designing gift box
This was a very simple plane, but up from extrusion. Slider was created using a copy of the base inner plane and extruded. I was not sure if inside slider rail would work at 90 degree inner edges but seemed to work fine. May require some clean up on the slider track inner corners.