Abstract: The invention relates to a capsule (1) for insertion in a beverage production machine adapted to supply pressurized liquid into the capsule (1), the capsule (1) comprising at least one compartment (13) containing nutritional ingredients (14) for the preparation of a nutritional composition in combination with the supplied liquid, the capsule (1) further comprising a product delivery system (15) arranged at an outlet face (8) of the capsule (1) and designed for delivery of the nutritional composition, the product delivery system (15) comprising one or several plurality of perforating elements (16) designed to perforate a membrane (17) arranged between the compartment (13) and the outlet face (8) of the capsule (1) as a result of the pressure of liquid exerted in the compartment, wherein the perforating elements (16) each comprise three blade members (21) extending from a common axis (A).