Any cigar aficionado would love receiving this Visol humidor care kit. It has everything needed to regulate the moisture level of your humidor. The bottle of frequent use solution is also known as Ultra Pure Water. It is a mixture of purified water and cationic surfactants that will keep the properties of tobacco fresh and pure if added to a humidor on a weekly basis. The bottle of propylene glycol will keep the humidor at an optimized humidity level while preventing the spread of bacteria within it. The moisture control crystals will keep your humidor at a range of 66-70% humidity. There is even an odor eliminator solution in this kit to remove the smell of tobacco from your clothes and furniture.