The postage size chip is made out of a soft silicone and uses a strong magnetic field to separate the water from contaminants. The chips are small enough that 1600 of them could be mounted in an array on an eight inch disc which could produce as much as fifteen liters of water an hour... Which is just about perfect for a cruising boat... Best part, as far as I can tell, is that the "chips" are self cleaning!
Yowza! So much for that home brew watermaker project...
More about it from MIT...
