It's a Airtight container like a pill vile with grinder teeth on the bottom of the container and under the lid .so you unscrew your grindtainer and flip the lid over and grind your herb on the bottom.. My friend gave me this for free I think it's a prototype or something because this is the only black one I've seen. ..they sell them in small med and large .this ones a med. 15 bucks for all 3 sizes on there website What do you guys think. Is it a good idea?!