Bamboo herb grinder - magnetic closure Built-in tray - under the magnetic lid is a tray and herb funnel, designed for working with your ground herbs.  And, it's a nice place to save a little for later...cool, huh? The grinder teeth are specifically machined of aluminum alloy with an epoxy coating for clean cutting.   Why I-70?We like to name products after places in our home state of Colorado.  Interstate 70 is the main route to get up into our beloved mountains, but the weekend traffic can be brutal.  So as they say, it's a real grind. 2.75" L x 2.25" W x 2.75" H