Emergency Mint Ring

When you open the screw-top lid of this ring, there is a compartment big enough to fit an Altoid mint (or other types of mints). The compartment diameter is 15mm and its depth is about 8mm.

Please read this great Prusa blog on making 3D prints food safe. Personally, I've chosen to just wrap the mint in clear plastic wrap before putting it in the ring.

How to make food-grade 3D printed models
 

Printing (General)

• Layer height: .15mm recommended (because of the threads) but .20mm works
• Infill: 15%
• No supports needed
• I didn't need a brim but consider one depending on your adhesion
• Putting the seam at the rear of the models is recommended for a cleaner finish

Determine which size ring you need

In the Ring Size Test folder there are .stl files so that you can quickly print test rings of different sizes ranging from 14mm to 23mm in 1mm increments (inner diameter).

NOTE: If you lose track of which test-ring is which, look at the square and round protrusions. Each square is a 10 and each round nub is a 1. So a ring with 1 square and 5 round nubs represents 15mm.
 

Optional Color Change

The warning sign is recessed into the case top. If you want the warning sign to be more visible in the print, do a color change at the very first layer after the warning sign is printed. 

You can add additional color changes to create decorative bands of color.

Attaching Ring to Case Bottom

The ring attaches to the case bottom by pressing the prongs into the slots. Check your orientation to make sure the ring is centered as in the picture below.