A dispenser (10) for dispensing a fluid from a container T comprises an inlet (14) for connecting to the container so as to receive the fluid therethrough, and an outlet (16). The outlet comprises at least two walls (18), each with a respective slit (22) thereon adapted to open to release fluid therefrom when a predetermined pressure is applied to the fluid in the dispenser at the outlet, and to close to retain fluid in the dispenser at a pressure less than the predetermined pressure.