This is an old technology. Often seen late at night on "As Seen On TV". They have become very refined over time. Rugged, injection moulded (mass produced), yea

This is an old technology. Often seen late at night on "As Seen On TV". They have become very refined over time. Rugged, injection moulded (mass produced), years of iterations to fix problems. Designed for remote or unit living. Some higher tech components have been reversed like pressurising them I assume because the complexity has not matched in field experience. ie - https://www.youtube.com/watch?v=zUVR2vjRJRo https://www.youtube.com/watch?v=zUVR2vjRJRo What problem does this solve? I have never seen one used by the poor compared to normal hand washing or electric, perhaps it would be done inside compared to hand washing so it might be bias. The evidence to me is hand washers like these are more for the rich getting third level education or living in downtown apartments or travelling the country or people into low tech solutions.