Patent ID: 8802031

Claim:
A liquid dispensing device consisting of a hollow body ( 7 ) and a cap member ( 1 ), wherein: the hollow body ( 7 ) has an opening ( 9 ) in a lower end thereof for receiving liquid and an upper opening; and the cap member ( 1 ) is arranged to sealingly close the upper opening in the body ( 7 ), said cap member ( 1 ) comprising: a resilient planar diaphragm ( 2 ) situated substantially perpendicular to a longitudinal axis of the body ( 7 ) which is deformable in a downwards direction; a resilient side wall ( 3 ) which extends downwardly from the diaphragm ( 2 ) and engages either an internal or external surface of the body ( 7 ); and a discrete protuberance ( 5 ) projecting upwards from a central region of the diaphragm ( 2 ), wherein the discrete protuberance ( 5 ) is arranged to receive an applied displacement force; wherein the diaphragm ( 2 ) has an elasticity corresponding to a SHORE rating from 30 A to 120 A.