The invention relates to a dispensing device which can be used to dispense a metered volume of a flowable material such as a liquid, gel or paste product from a reservoir. The invention provides a pump (101) for dispensing a flowable material from a container, the pump including a pump body (102) which is deformable between a rest configuration and a squeezed configuration, the internal capacity of the pump body being substantially reduced in the squeezed configuration compared to the rest configuration. The pump includes a unidirectional valve to allow ingress of the flowable material into the pump body from the container and an outlet (104) to allow egress of flowable material from the pump body such that squeezing of the pump body dispenses the flowable material from the container. The pump assembly includes a sealing member (130) located within the pump body and mounted for translational movement. The sealing member (130) includes a nose (132) which seats against the internal wall (133) of the pump body to seal the outlet (104).