The lid is magnetised to reduce spillage. The grind is smooth as silk, with its razor-sharp teeth, ensuring a consistent grind every time. Size is perfect to tip into the Good Herb smell-proof jars, too. We have 2 colors to go with your box. The grinders are made of top-quality zinc alloy with no toxic materials. It also has a built-in pollen catcher. Part of the essentials to go with your box.