 In 2018 even a line of "natural sodas" in one-way single serve bottles was introduced under the name Royal Club 1939, with the year typefaced most boldly on the labels.This claim for 1939 is derived from the Benelux Trade Marks Register which states that the word brand Royal Club was registered in 1939.There has however never been presented any factual of physical proof (in the form of bottle labels, crown corks, advertisements, etc.)