Liquid dispensing device with a cap and a diaphragm

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.