A spout (3, 3') for a container, in particular a sealed package, filled with a pourable product; wherein the spout comprises: - a base frame configured to be fitted about a designated pour opening surface area of package and having a collar being provided with a pouring outlet, configured to allow for an outflow of the pourable product from the package; - a lid assembly coupled to the collar, and being configured to at least selectively close or open the pouring outlet; wherein the collar extends along a longitudinal axis; - - a ring-shaped cutter moveably coupled to the collar, and being configured to at least partially cut the designated pour opening surface area; - - a control device configured to interact with and to control the cutter between a rest position, in which cutter is configured to be retracted from the designated pour opening surface area, and an operative position in which the cutter is configured to at least partially cut the designated pour opening surface area; wherein the lid assembly comprises: - a coupling ring rotatably arranged around the collar; - a lid hinged to the coupling ring and angularly movable around a respective hinge axis, being orthogonal to longitudinal axis; - a coupling element configured to hinge the lid to the coupling ring and defining said hinge axis; characterized in that the spout (3, 3') also comprises a tamper-evidence ring arranged around the collar. wherein the spout comprises: - a base frame configured to be fitted about a designated pour opening surface area of package and having a collar being provided with a pouring outlet, configured to allow for an outflow of the pourable product from the package; - a lid assembly coupled to the collar, and being configured to at least selectively close or open the pouring outlet; wherein the collar extends along a longitudinal axis; - - a ring-shaped cutter moveably coupled to the collar, and being configured to at least partially cut the designated pour opening surface area; - - a control device configured to interact with and to control the cutter between a rest position, in which cutter is configured to be retracted from the designated pour opening surface area, and an operative position in which the cutter is configured to at least partially cut the designated pour opening surface area; - a base frame configured to be fitted about a designated pour opening surface area of package and having a collar being provided with a pouring outlet, configured to allow for an outflow of the pourable product from the package; - a lid assembly coupled to the collar, and being configured to at least selectively close or open the pouring outlet; wherein the collar extends along a longitudinal axis; - - a ring-shaped cutter moveably coupled to the collar, and being configured to at least partially cut the designated pour opening surface area; - - a control device configured to interact with and to control the cutter between a rest position, in which cutter is configured to be retracted from the designated pour opening surface area, and an operative position in which the cutter is configured to at least partially cut the designated pour opening surface area; wherein the lid assembly comprises: - a coupling ring rotatably arranged around the collar; - a lid hinged to the coupling ring and angularly movable around a respective hinge axis, being orthogonal to longitudinal axis; - a coupling element configured to hinge the lid to the coupling ring and defining said hinge axis; - a coupling ring rotatably arranged around the collar; - a lid hinged to the coupling ring and angularly movable around a respective hinge axis, being orthogonal to longitudinal axis; - a coupling element configured to hinge the lid to the coupling ring and defining said hinge axis; characterized in that the spout (3, 3') also comprises a tamper-evidence ring arranged around the collar.