A humidor is a humidity-controlled box used primarily for storing Cigars or pipe tobacco. Either too much or too little humidity can be harmful to tobacco products; a humidor’s primary function is to maintain a steady, desirable moisture level inside. It also protects its contents from physical damage and deterioration from sunlight. For private use, small wooden boxes holding a few dozen or fewer cigars are commonly used. The ideal relative humidity in a humidor is around 68–72%. Though it can vary slightly depending on the cigar smoker’s preferences, it should never go higher than 75%.