Waterwood Mini Nitrous Oxide Bottle Keychain Pill Box Storage Key Ring with Car Cleaning Cloth Novelty Nitrous Oxide bottle design, perfect decoration, unique and fashionable. You can unscrew it to store small objects, such as pills. Convenient and practical, help you to manage your keys better. A memorable and collectible keychain, perfect gift for your friend who is the car lover. Compact and portable, easy to carry and store.