Patent ID: 6446822
Filing Date: 2002-09-10
Classification: A61J

Abstract:
A nursing bottle comprising:a tubular flexible shell having a lower end and an upper end; a bottom end cap removably engaged with the lower end, the bottom end cap having a plurality of holes therethrough; a top end cap removably engaged with the upper end, said top end cap capable of receiving a nipple; a bag disposed within the shell, defining an open volume between the shell and the bag, the bag being open to the nipple when the nipple is installed; and a resiliently flexible flat disk having a plurality of slits therethrough, the slits being closed to airflow when pressure inside the bottle is greater than ambient pressure, the slits being open to airflow when pressure inside the bottle is less than ambient pressure, and the disk being disposed within the bottom end cap such that the disk is secured between a base of the bottom end cap and the shell; wherein the slits in the disk are farther from a center of the disk than the holes in the bottom end cap are from a center of the bottom end cap.