Patent ID: 7997454

Claim:
A dispensing device, comprising: a base plate, having an upstream side and a downstream side, and defining a liquid flow aperture therethrough; a flap of material removably positionable over the liquid flow aperture and in sealing engagement with the downstream side of the base plate; a flexible pump housing, having an inner cavity and a flap contact surface on an inner wall, sealed to the downstream side of the base plate and positioned about the flap of material; the flexible pump housing and base plate further defining an exit port; the flexible pump housing being configured to draw liquid from the upstream side of the base plate, through the liquid flow aperture and into the inner flow cavity; the flexible pump housing being further configured to urge liquid through the exit port when the flap contact surface of the flexible pump housing has pressed the flap of material against the downstream side of the base plate to seal the liquid flow aperture to prevent flow of liquid therethrough.