Abstract: The present invention relates generally to packaging containers. The packaging containers include a vessel and a cover, and may be used in the food and beverage industry. In one aspect, the invention relates to packaging containers in which beverage ingredients may be stored, and from which a beverage may be prepared by adding a liquid to the ingredients may be consumed. The invention provides, in one aspect, a packaging container including a vessel defining a vessel base wall and an upstanding vessel side wall structure extending upwardly from the vessel base wall, defining an inner zone capable of retaining liquid, a cover defining a cover base wall and a cover side wall structure extending upwardly from the cover base wall configured to rest within the vessel side wall structure, whereby a void is defined between the vessel and the cover, and a circumferential seal adapted to seal the cover to an outer surface of the vessel below the vessel rim formation.