This is fantastic stuff!

Just saturate your HUMI-CARE jar with a small amount of distilled water and the beads absorb and expand. These specially-formulated beads contain a humidity-balancing solution of propylene glycol, so you’re assured of a slow, steady release of moisture and constant humidity of 65-70%. Each refill with water typically lasts 1 to 2 months, and each jar can be refilled over and over for up to a year before replacing. It’s a no-brainer, keeps your stash in good stead and means very, very little babysitting by you. Now available in either 2 oz. or 4 oz. jars. The smaller jars are ideal for your smaller 20-40 count humidors or as supplemental humidification on different shelves in a larger humidor. The larger jars are ideal for 40-150 capacity humidors - grab a couple of jars if you have a bigger humidor or multiple shelves.

Note: We ship these jars deactivated. When they arrive, the beads will be small and dry. To charge them up, fill the cup about halfway with distilled water or HUMI-CARE Cigar Juice and the beads will soak up the water and expand. 

Dimensions:
4 oz. jar - 2.5"H x 2.63"D
2 oz. Jar - 1.86"H x 2.13"D