Space poop challenge.

Nasa  have  a problem  to solve ,how to help astronauts  go to the  toilet and offering  24,000 to solve  it. The  challenge to  help  the crews that spend days in their  spacesuits in an emergency. For  the  challenge  you  need to design a portable  hands free  device and must dispose  of  human  waste  up to 6 days for possible mission  to Mars. Astronauts wear  nappies  during  space walks .