The Oasis Foam Humidor Humidifier sits in your cigar humidor and keeps the moisture level at the correct humidity. Can be used with distilled water or humidor solution aka humidor elixir. Made from top quality Oasis foam, this traditional humidifier is built to last through years of use. Comes in a black plastic housing with mesh front. Choose the size according to the number of cigars in your humidor: 50, 100 or 250.