iv tried those, didnt work for me at all. that liquid is not pure h2o, dont try to drink it for fucksake. i tried one out ages ago and it took about 2 weeks for the crystals to fully turn into about a pint of liquid. i think its a gimmick showing you the water and all but its hardly anything compared to whats in the air. i think it was designed for using in wardrobes to stop cloths being slightly damp and smelling. probably would work for that. but if your looking to extract about 4 pints in a couple of hours then you need a proper dehumidifier