A pourer for a liquid container said pourer having a longitudinal axis extending along a longitudinal direction (X-X), said pourer comprising: - a tubular body able to be attached to a container, said tubular body extending longitudinally between a lower portion and an upper portion, - a pouring spout housed within the tubular body and movable to reversibly slide, relative to the tubular body, in the longitudinal direction (X-X), between a retracted position, in which the pourer is closed by a cap and an extracted position, in which the pourer is designed to pour the liquid contained in the container through the pouring spout, wherein - said tubular body comprises, at the lower portion: - a wall extending on a plane substantially perpendicular to the longitudinal direction (X-X) to intercept the flow of liquid from the container to the upper portion of the tubular body, and - at least one liquid passage opening formed laterally in the tubular body, above the wall, to allow the flow of liquid to the upper portion of the tubular body, wherein - said pouring spout has a pouring rim, which is shaped to define a pouring orientation, - said tubular body and said pouring spout are coupled together by coupling means that are able to guide the movement of the pouring spout relative to the tubular body between the retracted and extracted positions and prevent rotation of the pouring spout relative to the tubular body to hold the relative angular position of the pouring rim with respect to said at least one liquid passage opening, - said coupling means comprise at least one first guide element formed inside on the tubular body and at least one second guide element formed outside on the pouring spout and operatively coupled to the at least one first guide element to allow the pouring spout to slide relative to the tubular body, - said tubular body comprises an inner sleeve, an outer sleeve and a connecting flange for connecting the inner and outer sleeves (26, 27), and said wall is located at the lower portion of the inner sleeve to close the bottom of said inner sleeve, and said at least one liquid passage opening is formed in the inner sleeve, - a tubular body able to be attached to a container, said tubular body extending longitudinally between a lower portion and an upper portion, - a pouring spout housed within the tubular body and movable to reversibly slide, relative to the tubular body, in the longitudinal direction (X-X), between a retracted position, in which the pourer is closed by a cap and an extracted position, in which the pourer is designed to pour the liquid contained in the container through the pouring spout, - said tubular body comprises, at the lower portion: - a wall extending on a plane substantially perpendicular to the longitudinal direction (X-X) to intercept the flow of liquid from the container to the upper portion of the tubular body, and - at least one liquid passage opening formed laterally in the tubular body, above the wall, to allow the flow of liquid to the upper portion of the tubular body, wherein - a wall extending on a plane substantially perpendicular to the longitudinal direction (X-X) to intercept the flow of liquid from the container to the upper portion of the tubular body, and - at least one liquid passage opening formed laterally in the tubular body, above the wall, to allow the flow of liquid to the upper portion of the tubular body, - said pouring spout has a pouring rim, which is shaped to define a pouring orientation, - said tubular body and said pouring spout are coupled together by coupling means that are able to guide the movement of the pouring spout relative to the tubular body between the retracted and extracted positions and prevent rotation of the pouring spout relative to the tubular body to hold the relative angular position of the pouring rim with respect to said at least one liquid passage opening, - said coupling means comprise at least one first guide element formed inside on the tubular body and at least one second guide element formed outside on the pouring spout and operatively coupled to the at least one first guide element to allow the pouring spout to slide relative to the tubular body, - said tubular body comprises an inner sleeve, an outer sleeve and a connecting flange for connecting the inner and outer sleeves (26, 27), and said wall is located at the lower portion of the inner sleeve to close the bottom of said inner sleeve, and said at least one liquid passage opening is formed in the inner sleeve,