As a Magic action, you can open or close this bottle. Opening the bottle causes thick smoke to billow out, forming a cloud that fills a 60-foot Emanation originating from the bottle. The area within the smoke is Heavily Obscured. Each minute the bottle remains open, the size of the Emanation increases by 10 feet until it reaches its maximum size of 120 feet. Closing the bottle causes the cloud to become fixed in place until it disperses after 10 minutes. Gust of A strong wind (such as that created by the Wind spell) disperses the cloud after 1 minute.

Smoke leaks from the lead-stoppered mouth of this brass bottle, which weighs 1 pound. When you use an action to remove the stopper, a cloud of thick smoke pours out in a 60-foot radius from the bottle. The cloud's area is heavily obscured. Each minute the bottle remains open and within the cloud, the radius increases by 10 feet until it reaches its maximum radius of 120 feet. The cloud persists as long as the bottle is open. Closing the bottle requires you to speak its command word as an action. Once the bottle is closed, the cloud disperses after 10 minutes. A moderate wind (11 to 20 miles per hour) can also disperse the smoke after 1 minute, and a strong wind (21 or more miles per hour) can do so after 1 round.