A closure device comprising: a pour spout and a cap; the cap comprising a lid portion, a linking portion and a retainment portion, the linking portion linking the lid portion to the retainment portion and the retainment portion being retained around the pour spout; the lid portion being resealably arranged on the pour spout allowing the closure device to be brought between an open position and a closed position; the pour spout and the cap, when the closure device is in the closed position, having a longitudinal, central axis; the cap comprising first and second separation lines (340, 342) along which the cap is configured to separate when the closure device is brought from the closed position to the open position; the first separation line, when the closure device is in the closed position, extending circumferentially around the cap between a first endpoint and a second endpoint, the first and second endpoints (344, 346) of the first separation line defining between them a first bridge section configured to connect the retainment portion to the linking portion, said first bridge section having, when the closure device is in the closed position, a circumferential extent (α) about the longitudinal, central axis that is less than 90°; the second separation line, when the closure device is in the closed position, extending circumferentially around the cap between a first endpoint and a second endpoint, the first and second endpoints (350, 352) of the second separation line defining between them a second bridge section configured to connect the lid portion to the linking portion, said second bridge section having, when the closure device is in the closed position, a circumferential extent (β) about the longitudinal, central axis that is less than 90°; the first bridge section and the second bridge section being located at opposite sides of the cap when the closure device is in the closed position; characterised by the first bridge section being a non-breakable bridge section configured to permanently connect the retainment portion to the linking portion, the second bridge section being a non-breakable bridge section configured to permanently connect the lid portion to the linking portion; and the circumferential extent (α) of the first bridge section being within the range of 10° to 90°. a pour spout and a cap; the cap comprising a lid portion, a linking portion and a retainment portion, the linking portion linking the lid portion to the retainment portion and the retainment portion being retained around the pour spout; the lid portion being resealably arranged on the pour spout allowing the closure device to be brought between an open position and a closed position; the pour spout and the cap, when the closure device is in the closed position, having a longitudinal, central axis; the cap comprising first and second separation lines (340, 342) along which the cap is configured to separate when the closure device is brought from the closed position to the open position; the first separation line, when the closure device is in the closed position, extending circumferentially around the cap between a first endpoint and a second endpoint, the first and second endpoints (344, 346) of the first separation line defining between them a first bridge section configured to connect the retainment portion to the linking portion, said first bridge section having, when the closure device is in the closed position, a circumferential extent (α) about the longitudinal, central axis that is less than 90°; the second separation line, when the closure device is in the closed position, extending circumferentially around the cap between a first endpoint and a second endpoint, the first and second endpoints (350, 352) of the second separation line defining between them a second bridge section configured to connect the lid portion to the linking portion, said second bridge section having, when the closure device is in the closed position, a circumferential extent (β) about the longitudinal, central axis that is less than 90°; the first bridge section and the second bridge section being located at opposite sides of the cap when the closure device is in the closed position; characterised by the first bridge section being a non-breakable bridge section configured to permanently connect the retainment portion to the linking portion, the second bridge section being a non-breakable bridge section configured to permanently connect the lid portion to the linking portion; and the circumferential extent (α) of the first bridge section being within the range of 10° to 90°.