WW2 era - morale booster - 'Don't worry about me - everything's O.K.' - OK Sauce, a fruity brown sauce not dissimilar from HP, was a popular British condiment for the first half of the 20th century. Eventually, it was dropped by most major supermarkets, but has, oddly enough, found a home in the Chinese community. You can occasionally find a bottle, now with prominent Chinese lettering, in Chinese stores.