The most revolutionary concept in cigar humidification to come along in decades.  Clear Tube breathes through walls - Cannot drip onto your Cigars. Space age plastic tube allows humidity to escape through micropores while holding water in. Shaped like a cigar - Fits easily in the place of a cigar.  Easy To Maintain 70% Humidity. Maintains proper humidity in any closed container. Add Plain Tap Water Every 1-3 Months - As the water evaporates from the crystals, they shrink in size to give you a visual indication as to when to add more water.