Cigar Humidors
The level of humidity in which cigars are kept greatly varies their taste. It is believed that a cigar's flavor best evolves when stored at a relative humidity of approximately 68-74% and a temperature of 64 F. An ideal rate of humidity allows an even burning of the cigar. On the contrary, dry cigars become fragile and burn faster while damp cigars burn unevenly and take on a heavy acidic flavor. Humidors together with their humidifiers are then used to serve this purpose. Humidor's interior lining is basically constructed with three types of wood which are: Spanish cedar, American (or Canadian) red cedar, and Honduran mahogany.
Most humidors come with a plastic or metal case with a sponge that works as the humidifier, although most recent versions come on polymer acryl. The latter must be filled only with distilled water, and the former may use a solution of propylene glycol and distilled water as well. Humidifiers may get contaminated with bacteria and to avoid such contamination they should be replaced every two years.
Humidors also come with hygrometers which are analog or digital. There are three systems of analog hygrometers: analog hygrometers with a metal spring, analog natural hair hygrometers, and analog synthetic hair hygrometers.
Source: Cigar - Wikipedia, the free encyclopedia