I have made a box with a simple flush lid. It twists close. It's a little large (112mm diameter by 100mm tall) but scales down to 50% quite well. Enjoy.

Update:
I originally designed this model using SketchUp, which does not natively support .step files. As a personal excercise, I have recreated this model using Fusion 360. I have since uploaded the resulting step files and fusion design file for anyone wishing to remix my design. I'm still including the original sketchup file for archival interest.