A pressurised refill canister for a simulated cigarette, the canister containing a reservoir of composition including a propellant, and a non-metered refill outlet valve comprising a stem displaceable from a first position to a dispensing position against the action of a resilient member having a spring force of at least 10N in the uncompressed state when no external force is applied to a dispensing position against the action of the first resilient member. The stem comprises a blind bore open at an outlet end and closed at the opposite end and a lateral bore in the side wall of the stem leading to the blind bore. The refill outlet valve further comprises an annular seal which surrounds the stem whereby, in the first position, the lateral bore is not in communication with the inside of the canister, and in the dispensing position, the lateral bore is arranged to move inside the canister with respect to the seal to open a flow path from the inside of the canister via the lateral bore and along the blind bore to the outlet end. A refill valve with a lateral bore which moves in against the resilient member into selective communication with the canister through a seal provides a simple robust mechanism for achieving a non-metered refill outlet.
