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 , <EOS>