Patent ID: 7478733

Claim:
A baby bottle comprising a bottle for holding a liquid and having a top; and a mouth formed on the top of the bottle; an air valve device mounted in the mouth of the bottle and comprising a valve seat mounted on the mouth of the bottle and having a center; a stem hole formed through the center of the valve seat; and at least one through hole formed through the valve seat around the stem hole; a valve stem mounted slidably in the stem hole and having a top end; a bottom end having an annular slot; and a head being larger than the stem hole, formed on the top end of the valve stem for keeping the valve stem from going into the bottle; and a valve disk being hollow, attached to the bottom end of the valve stem and having an air chamber attached to the bottom end of the valve stem and having a proximal end; a distal end; and a mounting hole formed through the proximal end of the air chamber and mounted in the annular slot at the bottom end of the valve stem; and an annular disk formed around and protruding out from the proximal end of the air chamber to selectively close the at least one through hole in the valve seat; and a cap attached to the top of the bottle, for closing the mouth and comprising a nipple mounted on the valve seat; and a collar attached to the top of the bottle to hold the nipple and valve seat in place and having a central through hole for allowing the nipple to protrude from the bottle through the collar.