The invention concerns a dispensing canister comprising:—a reservoir (1) having a bottom in the form of a U shaped throat, two terminal walls (1c, 1d) and two side walls (1a, 1b) said side walls being attached to the upper extremities of the U shaped throat,—a rotatable volumetric dosing means (2): longitudinally extending through the bottom of the reservoir (1e), and. configured for displacing a volume of powder longitudinally through the bottom of the reservoir, and. lodged in the U shaped throat, the upper point of the U shaped throat extending at least up to the top of the rotatable volumetric dosing means, and wherein at least the portion of at least one of the reservoir side walls attached to the U shaped throat is straight outwardly inclined according to an angle of at most 25° with the vertical.