Patent ID: 8910810

Claim:
A feeding bottle comprising: a) a nipple composed of silicone and having: a teat portion having a variable wall thickness including a flow valve, a base portion having a wall thickness in a domed configuration, an areola portion between the teat portion and the base portion, a slit air valve extending through the base portion wherein the slit valve extends generally transverse to the base portion and opens under negative pressure within the feeding bottle, a flange connected to the base portion, a center axis running through the center of the base portion and transverse to the base portion, the teat portion of the nipple having circular symmetry around the center axis, and the teat portion being capable of moving towards and away from the base portion in a plane generally transverse to the base portion; b) a vessel having: an open threaded top with a first diameter, a body with a second diameter adjacent the open threaded top, the first diameter of the open threaded top being less than the second diameter of the body; the body having a center portion with a third diameter below the second diameter of the body, the third diameter being less than the second diameter of the body; c) a collar having: an internally threaded cylindrical portion, a downwardly domed peripheral portion surrounding and extending from the cylindrical portion, and the internally threaded cylindrical portion being sized to mate with the open threaded top of the vessel; and d) the nipple being secured to the vessel with the flange of the nipple being captured between the collar and the open threaded top of the vessel.