The airtight seal provided by the double-rubber O-ring lining on the cap of this storage puck ensures that odors are locked in. This lightweight and durable aluminum container is perfect for discreetly storing herbs on-the-go, and is designed to be interchangeable with Ongrok s 4 Piece EZ Grinder. Say goodbye to plastic baggies and hello to this sleek and efficient cylindrical stash case.