These crystals automatically maintains the 70% humidity levels required to keep cigars at their freshest. The humidification process is actually controlled by the nontoxic chemicals we charge into the Crystals in the factory. You never have to add anything but plain distilled water again. This is definately one of those, why the hell didn't I think of that so I could retire in Maui, products. The crystals inside are really cool. They swell up when they have water in them and shrink when they need more. Takes all the guess work out of it. And the best part, they just plain work.
The size is perfect to stash a few in different parts of your humidor, or pack one in your lunch bag to keep your tuna sandwich nice and fresh. Price is for 1 tube.