The CigarExtras Cigar Reservoir the newest introduction in passive humidification systems! This humidifier will reliably control humidity in personal size cigar humidors without the need for constant monitoring and maintenance. The Cigar Reservoir has been designed with the features required for a large capacity, passive humidifier. It will hold up to 8 oz of water, eliminating the need for frequent refilling. It contains a full length grid to maximize surface exposure and requires no adjustments to maintain proper humidity. It is completely filled with a water absorbent material so it won't spill on your cigars when you move or knock into your humidor. And it only requires using activator solution once. This may be the last humidifier you will ever need!*Assumes a well-designed, tight fitted humidor containing 75-150 cigars and opened up to three or four times a week.