The winner of the UK James Dyson Award, Timothy Whitehead, has designed a water bottle that uses ultraviolet (UV) light to sterilise drinking water anywhere in about 2 minutes.
The bottle has an inner and an outer chamber. The outer chamber is filled with dirty water and the inner chamber plunges through it and filters water particles as small as four microns. The clear water then takes about 90 seconds to sterilise by using a wind-up ultra-violet bulb. Apparently tests show that it sterilises 99.9% of bacteria and viruses. Wow!