The lid can be used to easily ground exactly the amount of spices you need. When cooking, the spices inside are properly protected from moisture such as steam. The body is made of heatproof glass, which is resistant to changing colours or having lingering odours. The mill can be used for rock salt, whole pepper, dried garlic, and many other spices. It also fits perfectly on your table or in your cupboards alongside HARIO's Soy Sauce Bottle and One Touch Dressing Bottle!