A container with a reusable cap, including: • a glass receptacle provided with a receptacle opening surrounded by a cylindrical neck including retention configurations on a cylindrical outer surface thereof, said cylindrical neck defining an annular mouth surrounding the receptacle opening ; • a cap including a closing portion completely covering the receptacle opening and an engagement portion made of metal sheet and including a cylindrical segment with an inner diameter; • a releasable closure mechanism connecting the engagement portion with the retention configurations to provide engagement between the cap and the glass receptacle producing a compression force on the closing portion towards the annular mouth when the cap is in an attached position; and • a sealing ring with an outer diameter equal to or smaller than the inner diameter of the cylindrical segment and compressed between the annular mouth and the closure portion providing a tight seal; the cylindrical segment includes one or multiple radial protrusions , directed inwards, defined by local deformations of the metal sheet and placed at a distance from the closing portion , said radial protrusions determining a local narrowing of the inner diameter of the cylindrical segment , the sealing ring being retained within the cap when the cap is in a detached position from the glass receptacle by having an outer diameter bigger than the local narrowing; and the sealing ring is not adhered to the cap ; characterized in that the closing portion and the engagement portion of the cap are independent to each other, and the engagement portion further comprises a ring mouth segment overlapped to a perimeter area of the closing portion , retaining said closing portion between the ring mouth segment and the sealing ring . • a glass receptacle provided with a receptacle opening surrounded by a cylindrical neck including retention configurations on a cylindrical outer surface thereof, said cylindrical neck defining an annular mouth surrounding the receptacle opening ; • a cap including a closing portion completely covering the receptacle opening and an engagement portion made of metal sheet and including a cylindrical segment with an inner diameter; • a releasable closure mechanism connecting the engagement portion with the retention configurations to provide engagement between the cap and the glass receptacle producing a compression force on the closing portion towards the annular mouth when the cap is in an attached position; and • a sealing ring with an outer diameter equal to or smaller than the inner diameter of the cylindrical segment and compressed between the annular mouth and the closure portion providing a tight seal; the cylindrical segment includes one or multiple radial protrusions , directed inwards, defined by local deformations of the metal sheet and placed at a distance from the closing portion , said radial protrusions determining a local narrowing of the inner diameter of the cylindrical segment , the sealing ring being retained within the cap when the cap is in a detached position from the glass receptacle by having an outer diameter bigger than the local narrowing; and the sealing ring is not adhered to the cap ; characterized in that the closing portion and the engagement portion of the cap are independent to each other, and the engagement portion further comprises a ring mouth segment overlapped to a perimeter area of the closing portion , retaining said closing portion between the ring mouth segment and the sealing ring . <EOS>