Nursing bottle utilizing air pressure to expel air from disposable liners and methods using same for feeding an infant

A method of feeding an infant or animal with a bottle, comprising:

• providing a bottle to an infant or animal, the bottle having:
• a body, open at an upper end and a lower end;
• a flexible liner containing liquid to be feed to the infant or animal open at one end, said liner open end suspended from said upper open end of said body;
• a feeding nipple attached to the body upper end;
• and a cap with an aperture, and a valve in said aperture, attachable to the open lower end of the body, and upper end over said feeding nipple;
• attaching the cap to the lower end of the body so that the cap creates a chamber between the liner and the body, and the liquid contained within the liner is removed during this feeding and a vacuum is created in said chamber to readily draw air into said chamber through said valve so as to compensate for the volume of liquid removed from said liner, and when this feeding stops, said valve prevents air from being drawn through said nipple into said liner.

A nursing bottle comprising;

• a resilient body, open at an upper end, and a lower end;
• a flexible liner, open at one end, said liner open end suspended from said upper open end of said body;
• a feeding nipple attachable to the body upper end;
• and a cap with an aperture, and a valve in said aperture, attachable to the open lower end of the body, and upper end over said feeding nipple, that when the cap is attached to the lower end of the body, said cap creates a chamber between the liner and the body, whereby, filling the liner, and applying pressure to the body to collapse the body to force air in the liner through the nipple, releasing the pressure to the body a vacuum is created in said chamber to readily draw air into said chamber through said valve so as to compensate for the volume of liquid removed from said liner, and when feeding stops, said valve prevents air from being drawn through said nipple into said liner.

A method of feeding an infant or animal with a bottle, comprising:

• providing a bottle to an infant or animal the bottle having:
• a resilient body, open at an upper end and a lower end;
• a flexible liner containing liquid to be feed to the infant or animal, open at one end, said liner open end suspended from said upper open end of said body;
• a feeding nipple attached to the body upper end;
• and a cap with an aperture, and a valve in said aperture, attachable to the open lower end of the body, and upper end over said feeding nipple, that when the cap is attached to the lower end of the body;
• the cap creates a chamber between the liner and the body, where by, filling the liner, and applying pressure to the body to collapse the body to force air in the liner through the nipple, releasing the pressure to the body a vacuum is created in said chamber to readily draw air into said chamber through said valve so as to compensate for the volume of liquid removed from said liner, and when this feeding stops, said valve prevents air from being drawn through said nipple into said liner.