Guarda su CINEBLOG01. Laundry soap brand Rinso was quick to jump on the 1940s fuel rationing bandwagon and remind housewives that, unlike other soaps, Rinso required very little hot water (it was customary to boil clothes at the time). This ingenious two-pronged marketing approach - bolster the war effort while increasing sales - was in keeping with the soap manufacturer's pioneering approach to advertising.