Looking to increase humidity levels within your humidor? If keeping your cigars at the proper humidity level with minimal effort is important to you, we suggest you pick one of these! You get a 2 oz. jar filled with unique pre-charged water absorbing crystals. These gel jars can be used in addition to your humidor's existing humidifiers or can be used alone. To use, simply open the top and set the jar in your humidor. Proper humidity levels are then maintained for up to 1-2 months. In time, when the jar water crystals shrink to about 3/4 full, simply remove the vented cap and add a 1/2 ounce of water or humidifier solution directly into the jar. Within a few hours the absorbent crystals will swell back to their full size. Crystals look like rock salt when dry and capture up to 400 times their weight in water. The perfect solution for humidity issues! Works perfectly with our PG Humidification Solution. Each jar accommodates up to 75 cigars. Add additional jars as needed based on your humidor's capacity.