Diamond Crown Humidification System is the only humidification system with a revolutionary water reservoir and wicking material to generate continuous moisture. Fully adjustable, this system with sliding stainless steel vents will keep your cigars at the optimal humidity level, never too dry or too moist. The Diamond Crown Humidification System eliminates the guess work of when it needs refilling. When the reservoir window shows empty, simply refill it with distilled water. Item #1544