I have created this case for my wife's Mounjaro pen and a months worth of needles, I believe some insulin pens are the same size but I have not tested it so proceed with caution.

The holder keeps one pen and 4 needles, the needles need a little pushing in so the foil meets the shape of the plastic casing but this keeps them from falling out. The pen itself fits nicely in the cutout and I have added holes and posts to hold some magnets allowing the box to stay together when being moved. The magnets need some force into the whole but holds them without the need for glue, I then added the second magnet on top and added some glue - This meant when I added the lid the magnets were in the perfect place. I also alternated the poles on the magnets to prevent the lid being put on the wrong way.

\\\\\ You will need /////

4 x Magnets (8mm x 3mm) - Link below

\\\\\ Print Settings /////

I printed this in standard PLA with 15% infill with no need to add supports

Printer: K1C

Nozzle: 0.4 mm

Print time: Approx 3 hours (K1C)

\\\\\ Links /////

https://www.amazon.co.uk/Wzone-Strong-Magnets-Fridge-Whiteboard/dp/B0CPVBKQGB/ref=sr_1_5?crid=39D6MJIZ6MVKL&dib=eyJ2IjoiMSJ9.VIZUOsJCnrNOgO9IQKwTgAFCjvW6TO6DCHU13o-wlDLMnGWzipjSPa7cdc1ExOctcdmaJUzOv43vVYiDecIqFymKgHlCNbz12oekr_9D7UyaNVWDGgnyK8izR05x1gU6ljO5dSi1Vuny6lX6mFe4ayRQQnLhVGFr69ngzmSZQzvwmYojIWDKff5gLIVim2re-_zmrH4O8rsv8V6lx7Be4H5MGtokD1LbhTVsBNpUsUNRR4X3VQln4OxqtutISGN2_Y1-CKItG6p0B3qDdH4kQ02_WVamiDoMFfG5SAC0Wi7tD1Y_JKzN2pCKUwAofxhdX48XttnU1go4UFUIwMriGWYuc_TRsOZ00aHVvFnFNT9jy8xpdKz2nyYfVHwK0JiLPUU_tNoAwzd12gpmtKqPMNB3yAJ91FcoyVHVmQi70AsRgRTcANKxtqTvW4Aebcfq.avNjmjUc48LBbNysvXgAB1Xcz6gb2n8MixSH4a6C7Oo&dib_tag=se&keywords=wzone%2Bmagnets%2B8x3&qid=1739719992&sprefix=wzone%2Bmagnets%2B8x3%2Caps%2C62&sr=8-5&th=1)

Mounjaro Case