Note that they are not merely aiming for portability, but efficient portability. This particular passage is suggestive of their device being more efficient tha

Note that they are not merely aiming for portability, but efficient portability. This particular passage is suggestive of their device being more efficient than RO at small scales, although no figures are given for comparison: > Commercially available portable desalination units typically require high-pressure pumps to push water through filters, which are very difficult to miniaturize without compromising the energy-efficiency of the device, explains Yoon.