Coffee capsule for coupling with multiple group heads has a flange whose proximal end meets a bottom end of the side wall. A raised plateau adjacent a bottom end of the side wall may receive pressure from and form a fluid-tight seal against the group head together with the side wall. A proximal lip more radially distal than the first plateau higher than the first plateau may protrude from the top surface of the flange. The side wall may have a narrowed top section to avoid protrusions from the group head. A curved top may have a circumferential strip of reduced thickness for water inlet formation. A second plateau along the top surface of the flange more radially distal than the proximal lip may form a fluid-tight seal against a different group head. The capsule may be made of polypropylene copolymer TR-50 and preferably about 80% TR-50 to facilitate sealing.
