A method of forming a nipple for a baby bottle, comprises: forming a lower conical wall section; forming a higher conical wall section molded above the lower conical wall section; preventing deformation of the higher conical wall section; and cutting an opening through the higher conical wall section into an interior section of the nipple.

A method of forming a nipple for a baby bottle, comprises: forming a lower conical wall section; forming a higher conical wall section molded above the lower conical wall section; preventing deformation of the higher conical wall section; and cutting an opening through the higher conical wall section into an interior section of the nipple.

The invention provides an air replenish valve for a drinking cup or feeding bottle, having a duckbill slit valve. First and second stiffening portions are provided at the ends of the slit as stiffening regions of the end walls. These assist in providing a desired valve function while also making reliable manufacture easier to achieve.

The invention provides an air replenish valve for a drinking cup or feeding bottle, having a duckbill slit valve. First and second stiffening portions are provided at the ends of the slit as stiffening regions of the end walls. These assist in providing a desired valve function while also making reliable manufacture easier to achieve.

According to a first embodiment, a feeding bottle comprises a vessel, collar, and nipple. The nipple comprises a base portion, a teat portion, an areola portion allowing movement of the teat portion towards and away from the base portion. According to a second embodiment, a feeding bottle comprises a vessel, collar, nipple and handle portion removeably secured to the vessel by the collar. The invention includes a flexible region or regions to provide a more natural feeding by closely mimicking the human breast.

According to a first embodiment, a feeding bottle comprises a vessel, collar, and nipple. The nipple comprises a base portion, a teat portion, an areola portion allowing movement of the teat portion towards and away from the base portion. According to a second embodiment, a feeding bottle comprises a vessel, collar, nipple and handle portion removeably secured to the vessel by the collar. The invention includes a flexible region or regions to provide a more natural feeding by closely mimicking the human breast.

A teat (10) for an infant feeding bottle (1), including a resilient wall (12) defining a central nipple (14a) and an areola (14b) that extend around a central axis (L), said teat being elastically transformable between a distended state in which the nipple defines a global maximum (38) and at least one depressed state that is accessible from the distended state by forcing the nipple at least partially into the areola along the central axis, and in which said wall (12) additionally defines an annular double fold (32) that defines an outer local maximum (34) and an inner local minimum (36), both extending circumferentially around the global maximum, wherein the wall defines a circumferential fold region (30) that, in said at least one depressed state, ranges from the local maximum to the local minimum of the double fold, and wherein said fold region has a rotationally asymmetric stiffness distribution.

A teat (10) for an infant feeding bottle (1), including a resilient wall (12) defining a central nipple (14a) and an areola (14b) that extend around a central axis (L), said teat being elastically transformable between a distended state in which the nipple defines a global maximum (38) and at least one depressed state that is accessible from the distended state by forcing the nipple at least partially into the areola along the central axis, and in which said wall (12) additionally defines an annular double fold (32) that defines an outer local maximum (34) and an inner local minimum (36), both extending circumferentially around the global maximum, wherein the wall defines a circumferential fold region (30) that, in said at least one depressed state, ranges from the local maximum to the local minimum of the double fold, and wherein said fold region has a rotationally asymmetric stiffness distribution.

A nursing bottle having an air returning function comprises a bottle body, a fixing cover, a nipple, a ventilation component, an air conduit, an elastic one-way valve set at a second opening of the air conduit and is located at the interior of the air conduit, a mounting part located on the second opening of the air conduit to secure the elastic one-way valve. The ventilation component, the air conduit, the elastic one-way valve and the mounting part form a gas returning device and are located on the interior of the bottle. The bottle reduces the contacting area between the air and the milk, lowering the amount of vitamin loss. The phenomenon of vomiting milk, choking and flatulence will be omitted since no air bubble is generated.

A partitioning component (210) for dividing a feeding bottle (110) into two sections: one (125) associated with a container (120) part of the bottle and one (115) associated with a teat part (110) of the bottle. The partition allows for at least partial retention of liquid in the teat part even when the bottle is tipped in a horizontal position, the more natural position for feeding a user such as a baby or toddler. To enable flow of fluid between the two sections, the partitioning component comprises a passageway arrangement (215) which comprises one or more openings (225) and the passageway arrangement configured to enable flow of both liquid and air across the partition in different directions. This allows liquid to pass in, and air to pass out, of the teat section (115) during filling of the teat. To enable maximal retention of liquid inside the teat section when the bottle is tilted in the horizontal position, the openings of the passageway arrangement are all confined to a single region of the partitioning component which, in use, is arranged offset on one diametric side of the bottle volume or of the teat volume.