The AquaMaker AM10 generates potable water from moisture harvested from the air—up to 36 liters in 38 hours, depending on the level of humidity. It's designed to replace traditional office water coolers, and when you calculate in the overall cost of distributing bottled water, it may very well be more efficient. Yet I can't help but point out that there is an even cheaper source of water in every office: the tap.
Still, for what it is, the AquaMaker looks well designed. It includes an air filter that removes dust, spores, and bacteria from the moisture it turns into water, cleaning the air in the process.
According to Ubergizmo, the AquaMaker AM10
retails for $1,200 and costs about $15 a day to operate. That's far too expensive for most part of the developed world, but perhaps in tropical, high-humidity areas where fresh water is hard to come by but power is not it might be a smart solution.
Update: The manufacturer of the AquaMaker sent updated, accurate operational costs for its device: "The MSRP for the AquaMaker AM10 is $1799. The operational cost is only $17 dollars per month."