It is hoped that a new suitcase-sized water purifying system that would save lives and dramatically cut the cost of relief efforts in disaster areas will form the basis of a rapid reaction force - but only with sufficient funding. Retired British water engineer, Ron Hire, who worked for years on UN water projects in Western Sahara, has developed a miniature water-purifier which fits into two suitcases, and could supply 4000 litres of drinking water per day, he told edie.