The present invention concerns a beverage capsule (300) comprising a capsule body (301) defining a cavity (302) in communication an open end (304), an injection wall (303) enclosing the cavity (302), a partition dividing the cavity (302) into an injection space (306) and a product space (307) which has at least one channel (311) configured to retard fluid flow between the two spaces, a rupturing means (309) within said injection space (306) configured to rupture said injection wall when deflected into said cavity (302), and a quantity of a beverage ingredient (308) within said product space (307); characterized in that it comprises a sealing support (312) disposed about said rupturing means (309), projecting from said partition (305) towards said injection wall (303), having a sealing surface (313) proximal to said injection wall (303), and configured to contact said injection wall (303) when it is deflected into said cavity (302) of said capsule body (301).