A beverage preparation capsule comprising a capsule body having a beverage preparation ingredient hermetically sealed therein, wherein a beverage outlet region of said capsule comprises: front and back sheets of air- and water-impermeable flexible film material arranged in face-to-face relationship along an edge; a folded strip of flexible film material in the form of a gusset extending inwardly from said edge, wherein at least a central region of said strip is provided with a plurality of perforations or a zone of weakness.