A small box to store pills with your keys! 
The cap has a spinning mechanism so you can open it securely without moving the box.

Printed fine without supports, 0,2mm 50% infill PLA. Move around the spinner a little bit after print to make it run smooth. 

On the photo it's combined with the model “Single-Hand Key Organizer” by basti30 found here on Printables. 

Enjoy!