When you release the liquid carbon dioxide from the tank, the expansion of the liquid and the high-speed evaporation of carbon dioxide gas cools the remainder of the liquid down to the freezing point, where it turns directly into a solid.
Quick Answer. Cigars stay fresh without a humidor for up to a month when kept in their original wrapper. Cigars kept in a humidor can last for years in a properly controlled environment. A humidor keeps cigars from drying out and the oils from evaporating. Keep Learning.
The size of a cigar is measured by two dimensions: its ring gauge (its diameter in sixty-fourths of an inch) and its length (in inches). In Cuba, next to Havana, there is a display of the world's longest rolled cigars.