Lotus Hydro Gel 2 and 4-ounce Jars keep your cigars fresh. Its humidor crystals regulate humidity to 70% relative humidity (RH). Lotus Hydro Gel Jars contains 99.9% USP certified Propylene Glycol with PG solution and it's ready to use. The Lotus Hydro Gel Jar will humidify 50 of your most treasured cigars!