This keychain features a rubber O-ring lining & screw cap that creates an airtight seal to lock in odors. This compact, durable container ensures the contents stay fresh and protected while on-the-go. Made of heavy-duty, anodized aluminum, it is lightweight and easily fits in your pocket or bag without damaging your flower. With its discreet design, it can be carried with confidence and easily stashed away in our Smell-Proof, Carbon Lined Cases, Wallets, and Pouches.