Extension for bottle dispenser, in particular for food product, having a stopper part (10) to be applied on the mouth of the bottle and provided with a spout (11) curved downwards, comprising in a single piece: a conduit portion (20) in continuation of the cavity of the spout (11) into which can be inserted with interference a vertical tubular cavity portion (21) into which converges the conduit portion (20), comprising an inner core (22) and coaxial outer cylindrical wall (23); a cladding portion (28) in continuation of the vertical tubular cavity portion (21) and brace (29) that surrounds the stopper part (10) of the dispenser; and a distinct elastomeric valve (3) to close the vertical tubular cavity portion (21)
