An ink bottle closure, comprising: a first closure member configured to be fixed to an ink bottle and configured to be fixed in operation to a receiving area of an adapter of an ink dispensing device, the first closure member including a seal, arranged to extend over an outlet opening in a neck of the bottle; a second closure member attached to the first closure member and retractably movable relative to the first closure member between a closed position, in which the second closure member covers the seal, and an open position in which the seal is exposed to be pierced or ruptured for dispensing ink from the bottle through the outlet opening, wherein the second closure member is movable in translation, relative to the first closure member between the closed position and the open position in a direction substantially perpendicular to a central or longitudinal axis of the bottle; and wherein the second closure member comprises a projection or ridge configured to be received in operation in a complementary recess in a base of a tray of the slider mechanism of a dispensing device such that in operation movement of the tray causes the movement of the second closure member 30 relative to the first closure member, while said first closure member remains fixed in the receiving area thereby preventing removal of the ink bottle closure from the dispensing device when the second closure member is in the open position; and wherein the first closure member includes a first lip or rim which extends circumferentially upstanding around the seal to inhibit migration of ink residue radially outwardly from said lip or rim. a first closure member configured to be fixed to an ink bottle and configured to be fixed in operation to a receiving area of an adapter of an ink dispensing device, the first closure member including a seal, arranged to extend over an outlet opening in a neck of the bottle; a second closure member attached to the first closure member and retractably movable relative to the first closure member between a closed position, in which the second closure member covers the seal, and an open position in which the seal is exposed to be pierced or ruptured for dispensing ink from the bottle through the outlet opening, wherein the second closure member is movable in translation, relative to the first closure member between the closed position and the open position in a direction substantially perpendicular to a central or longitudinal axis of the bottle; and wherein the second closure member comprises a projection or ridge configured to be received in operation in a complementary recess in a base of a tray of the slider mechanism of a dispensing device such that in operation movement of the tray causes the movement of the second closure member 30 relative to the first closure member, while said first closure member remains fixed in the receiving area thereby preventing removal of the ink bottle closure from the dispensing device when the second closure member is in the open position; and wherein the first closure member includes a first lip or rim which extends circumferentially upstanding around the seal to inhibit migration of ink residue radially outwardly from said lip or rim.