A small ring you can add to medication bottles or other places to track your last dose, an expiration date, or any other bit of data that could otherwise be easily forgotten.

https://youtu.be/MZRr8Ps7F6I

At this time, I recommend installing OpenSCAD (free) if you plan to customize this item. The Thingiverse customizer tool linked on this page may not render text as expected, however you can use it to get a general idea of the customization options.

This is my first OpenSCAD design, so feedback or remixed designs that improve on the script are appreciated.