A storage or infusion bottle (1) has an integrally molded bottle neck (3) with a teat-shaped bottle feature (4, 5) projecting from its mouth end. The closed teat end wall (6, 7) of the bottle feature is puncturable by an infusion needle. A cap (8) is attachable to the bottle neck (3) and has a funnel-shaped cap feature (9, 10) with an interior space accommodating the free end region of the bottle feature (4, 5). The intermediate space between the end wall of the bottle feature (4, 5) and the opposing side of the cap feature (9, 10) is completely filled by a hat-shaped sealing element (11, 12) enclosing the bottle feature (4, 5) at least in its end region remote from the bottle (1).