Patent ID: 7021495

Claim:
A device for dispensing a product, comprising: a container; a flexible-walled pouch inside the container, the flexible-walled pouch comprising an interior; a product contained in the interior of the pouch; a dip tube extending in the interior of the pouch, the dip tube having a free end located substantially at a mid-point of an axial height of the pouch, the dip tube having an opening at the free end of the dip tube, the opening being the only inlet for the flow of product into the dip tube; an airless pump in fluid communication with the interior of the flexible-walled pouch via the dip tube; and at least one passage configured to allow air entry into the container and outside of the pouch, wherein pressure in the interior of the pouch, at least prior to first use of the device, is less than or substantially equal to atmospheric pressure, and wherein the device is configured so that, as product is pumped from the interior of the pouch, a volume defined by the interior of the pouch above the free end of the dip tube is substantially equal to a volume defined by the interior of the pouch below the free end of the dip tube.