Copperstone "Keep it Humid" stone

[FretSpot]

I purchased a used humidor that came with one of these. Anyone know anything about them or how they work?

Here's a link to an ebay auction that had one:
http://www.ebay.com.au/itm/HERMIT-COPPERSTONE-KEEPING-IT-HUMID-WET-STONE-FOR-TOBACCO-OR-CIGARS-/230940342424?ViewItem=&item=230940342424&nma=true&si=O5o5%252BMPSDe%252B3cDVdP22Uo%252F0l6TM%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

 

[Monsterdg]

I understand that these are simply unglazed tile that you soak in distilled water for a few minutes to allow to absorb moisture. Kind of an outdated way to provide humidity, but kind of cool if you have an antique humidor or something.

Similar item for pipe tobacco on ebay: http://www.ebay.com/itm/new-HYDROST...e-in-Belgium-for-Pouch-and-Tins-/251042119115

 

[CWS]

I have a couple of antique humidors that are porcelain lined. The humi device is basically a slice of brick that is in mesh that you got wet and it provided moisture. This is an updated version. It would work the same as foam or most devices that come in humidors.

 

[Rupe]

I have my Great Grandfather's depression era humidor and while doing research on it I learned that back in the day they used bricks soaked in water to provide humidity.

I'm guessing that this is an updated (commercialized) version of that old school principle.