comes empty.. Holds 1/4 cup of course salt or peppercorns. This mill produces a fine grind. With a hardness rating close to that of diamond, the ceramic grinding mechanisms make short work of Celtic Sea Salt. Brand, peppercorns, herb blends, and even some. seeds. The unique, sturdy, and upright glass jar design prevents spilling on countertops and makes refilling a snap. This mill makes it easy to judge how much salt. to grind over food or for recipes.