Abstract: A combination of a container in which is disposed a liquid composition in the form of a beverage or liquid food and a drinking straw comprises a hollow elongate tube through which liquid may be drawn by suction. The tube has an outer surface and an inner surface. The combination includes an iron component and an oxidisable oil. The iron component is disposed inside the drinking straw and the oxidisable oil is in the liquid composition. The straw alone is also an aspect of the invention.