Abstract: A nursing bottle having a rigid body, an open end, and an aperture, a flexible liner suspended from the open end of the body, a feeding nipple attachable to the open end of the body. An attached, slidably engagable, pump for pumping air into the chamber between the liner and body. The pump pressurizes the chamber and expels air from the liner. An air regulating device permits airflow in and out of the chamber in restricted quantity, so when pressure is applied to the pump, there is an increase of pressure within the chamber to force out the air trapped within the liner. The pump, also fashioned to be the protective storage hood for the nipple.

Abstract: A method of feeding an infant utilizing a nursing bottle, having a resilient shell body with at least one aperture, a flexible liner, and a feeding nipple that utilizes air pressure to expel trapped air from a liner. That when the aperture or apertures are covered by the operator's finger or hand, and pressure is applied to the shell body, air trapped in the liner can be expelled prior to feeding the infant.

Abstract: A nursing bottle having a body, a flexible liner, and a feeding nipple. In one embodiment, the body includes a check valve to allow air into a chamber formed between the body and the flexible liner to equalize the pressure in the chamber and prevent air from leaving the chamber. This prevents the liner from expanding and air from reentering the liner. Other embodiments of the nursing bottle include a pump for introducing pressurized air into the chamber and thereby expelling air from the liner. In still other embodiments, the bottle comprises a two-part body in which the parts of the body are slidably and sealably engageable with each other wherein movement of the parts relative to each other pressurizes the air in the chamber and expels air from the liner. Disclosed are also methods of feeding an infant or animal utilizing such nursing bottles.

Abstract: The nurser is made of a resilient outer shell and a flexible liner. A nipple is attached to the upper end of the outer shell. The outer shell is squeezed to allow the pressure inside to increase and force air in the liner through the nipple. The nurser utilizes a one way valve on the outer shell to allow air into the shell when the pressure is released from the outer shell. This prevents the liner from expanding and air from reentering the liner.

Abstract: An air removal device for use with a flexible liner baby nursing bottle, having slots in the shell body that extend along the sides of the shell body, a disc inside the shell body with tabs that extend through the shell body, and a ring on the outside of the shell body that connects to the disc's tabs such that the movement of the ring/disc combination exerts pressure on the flexible liner and expels the air from the flexible liner.