This is a lid for a wide-mouth Mason jar. It does not screw on, but sits on top and can slide a small amount to the side to create a crescent-shaped opening for shaking out the contents.
The bottom side of the lid can be used as a teaspoon measurement as shown in the photo: the wedge-shaped volume between the ridge and the center line of the lid measures roughly one teaspoon.
The 8-oz wide mouth Mason jar is hard to find in stores but can be easily ordered online.
Since the jar holds the salt and the lid only makes occasional contact, I consider this a food safe 3D printing application, though I only use “natural” PETG for this model.
Happy printing and happy cooking!
The author marked this model as their own original creation.