I think as these students are worth a big prize of science.

Puri

The Puri is a portable fresh-water filtration and purification system that uses reverse osmosis technology. It is designed specifically for use on boats and in sudden marine emergency situations that lead to dangerous levels of dehydration and sometimes death.

Designed by Younsun Kim, Kangkyung Lee, Byungsoo Kim and Minji Kim of Yonsei University for Yonsei University
http://www.idsa.org/puri