In a future in which water will be a very precious resource, it could well be destined to consumption (food and drink) only, having to find a replacement for the hygiene and cleaning functions. 

This is the proposal of the authors of Nanosoap, a new soap concept that allows the cleaning of the body without using any water. It contains an intelligent gel made up of nanorobots that expands forming a thin layer that adheres to the body, detecting dirt and absorbing it, leaving the body clean.

In addition, Nanosoap features a solar charging system, so that it is not necessary to use any electricity.