A container comprising a body portion, a collapsible shoulder portion and an outlet aperture arranged on said collapsible shoulder portion, in which said collapsible shoulder portion comprises a base connected to said body portion, a top at which said outlet aperture is positioned and a central portion which tapers inwardly from said base to said top, in which said collapsible shoulder portion is collapsible from a start configuration in which said outlet aperture is aligned with a longitudinal axis of said container, to a collapsed configuration in which said outlet aperture is rotated from said axis, in which said collapsible shoulder portion comprises a bracing section, being an area of said central portion which is shaped and configured to support said collapsible shoulder portion against collapse when said outlet aperture is subjected to a first force applied in line with said axis by transmitting said first force from said top to said base, in which said collapsible shoulder portion comprises a structurally weakened section which is shaped and configured to fail in a non-resilient manner when subjected to a second force applied from an offset angle to said axis, in which said structurally weakened section comprises a discontinuity area formed in an outer surface of said central portion which extends both axially and circumferentially of said central portion and comprises an outline which surrounds said axis, characterised in that said outline comprises a first section which extends substantially 180 degrees around said axis at a constant first radial distance therefrom, and a second section which extends substantially 180 degrees around said axis at varying radial distances therefrom which are less than said first radial distance. in which said collapsible shoulder portion comprises a base connected to said body portion, a top at which said outlet aperture is positioned and a central portion which tapers inwardly from said base to said top, in which said collapsible shoulder portion is collapsible from a start configuration in which said outlet aperture is aligned with a longitudinal axis of said container, to a collapsed configuration in which said outlet aperture is rotated from said axis, in which said collapsible shoulder portion comprises a bracing section, being an area of said central portion which is shaped and configured to support said collapsible shoulder portion against collapse when said outlet aperture is subjected to a first force applied in line with said axis by transmitting said first force from said top to said base, in which said collapsible shoulder portion comprises a structurally weakened section which is shaped and configured to fail in a non-resilient manner when subjected to a second force applied from an offset angle to said axis, in which said structurally weakened section comprises a discontinuity area formed in an outer surface of said central portion which extends both axially and circumferentially of said central portion and comprises an outline which surrounds said axis, characterised in that said outline comprises a first section which extends substantially 180 degrees around said axis at a constant first radial distance therefrom, and a second section which extends substantially 180 degrees around said axis at varying radial distances therefrom which are less than said first radial distance.