A closure assembly comprising an article and a cap including a tamper-evident ring, wherein: - the article is made, e.g. moulded, of a plastic material and forms a tubular neck around a product passage in said article, said neck having a main axis and forming a mouth at a top end of said product passage, wherein the article further comprises a circumferential wall which is positioned around a bottom region of the neck and spaced from the neck forming an inner space which is open from above and adapted to receive a tamper-evident ring therein, - the cap is made, e.g. moulded, of a plastic material and is secured on or is to be secured on said neck of the article, the cap sealing the product passage in a closed position of the cap on said neck, and the cap being adapted to be manually removed from the neck of the article by a user to open the product passage, wherein the cap comprises a top wall and a downward depending skirt, said skirt having an interior side, an exterior side, and a lower edge remote from the top wall, wherein the tamper-evident ring is integrally formed to the lower edge of the skirt of the cap, said tamper-evident ring comprising an annular base portion which is connected via one or more breakable bridges to the skirt, wherein said annular base portion is at least partially inserted or adapted to be at least partially inserted into said inner space, characterised in that the circumferential wall of the article comprises at least one window which extends through said wall from a wall outer face to a wall inner face, wherein said annular base portion (32;32') has a base portion outer face and a base portion inner face and has at least one snap portion (33;33') which is positioned at the base portion outer face, wherein the at least one snap portion (33;33') is adapted to snap in a window (16;16') of the circumferential wall when the annular base portion of the tamper-evident ring is at least partially inserted into the inner space, wherein the at least one snap portion (33;33') comprises an axial stopper face which is adapted to retain the base portion axially within the inner space, and wherein the closure assembly is embodied such that a rotation of the base portion received in the inner space is blocked or limited, such that upon first time opening of the closure assembly by removal of the cap by a user the one or more bridges break and the base portion remains in the inner space of the article. - the article is made, e.g. moulded, of a plastic material and forms a tubular neck around a product passage in said article, said neck having a main axis and forming a mouth at a top end of said product passage, wherein the article further comprises a circumferential wall which is positioned around a bottom region of the neck and spaced from the neck forming an inner space which is open from above and adapted to receive a tamper-evident ring therein, - the cap is made, e.g. moulded, of a plastic material and is secured on or is to be secured on said neck of the article, the cap sealing the product passage in a closed position of the cap on said neck, and the cap being adapted to be manually removed from the neck of the article by a user to open the product passage,