Patent ID: 8361527

Claim:
A cartridge for use in forming a beverage, the cartridge comprising: a container having an interior space; a rim attached to the container and defining an opening to the interior space; a lid attached to the rim and closing the opening of the container, the lid consisting of a sheet of flexible material; a filter attached to the lid at a periphery located inwardly and away from the rim so as to form a gap between the periphery and the rim, the filter extending from the periphery into the interior space and separating a first chamber from a second chamber in the interior space, the filter being unattached to the container; and a beverage medium in the first chamber of the interior space arranged to interact with liquid introduced into the container to form a beverage; wherein the lid has a first portion that is pierceable by a beverage machine to accommodate an inflow of pressurized liquid into the first chamber of the interior space to form a beverage.