At a time when access to water is a strategic issue, L'Oréal and Gjosa have announced that they are now able to rinse shampoo with only 1.5 litres of water, instead of the 8 litres usually needed. The Swiss start-up Gjosa has developed a low-flow showerhead (2 litres of water/minute) which breaks up the flow of water while accelerating the speed of the droplets, so that the rinse is still as effective. To optimise the operation, scientists at L'Oréal developed easier-to-rinse shamp...