Here is a salt cellar — a dish to hold salt. It’s useful when you’re cooking and the recipe calls for a 1/4 t. of salt. You don’t have to walk to the pantry and haul out the 1 lb. box with the awkward metal opening (who invented that anyways!?) and try to pour out 1/4 t. Or you can put it on the table if someone wants to add a pinch to their meal.
I normally consider 3D printing to not be food safe, because the ridges create crevices for bacteria and other gunk to hide. But bacteria would be desiccated by the salt, so this would seem to be a safe project.
I got inspired to put a crystal on the top. It’s both decorative and useful as a handle to pull off the top. The top fits snugly, due to three ridges printed on the inside of closure.
In British English, a salt cellar is what we Americans call a salt shaker — a container with holes on the top. They might call this a “salt pig,” which is a dish for salt, but a salt pig is usually made of clay to keep the salt dry in humid climates.
Sprinkle it on the meal, sprinkle it on the popcorn, … we love salt. Salt has guided human history. Sprinkle on!