Singapore-based WateROAM aims to tackle this issue through a cost-effective way to convert waste water into drinking water. At just 400g, the company’s palm-size Fieldtrate Lite appears as a non-descript plastic bag but the portable filtration system claims to remove bacteria and other pathogens, without the need for electricity. The $25 device is able to filter 6-10 liters of dirty water in just an hour and is targeted towards households. What began as an entry…