Abstract: A device for use in increasing milk flow from a feeder bottle. The device includes a shaft adapted for entry into a correspondingly shaped hole in the feeder bottle. The device further includes a retention element for retaining the device in the hole and a channel, formed in a wall of the shaft. The shaft is movable such that it can, in a first position, seal the hole closed and, in another position (illustrated), permit airflow into the feeder bottle via the channel.

Abstract: A teat or nipple for the feeding of young animals. The teat is formed by a hollow body (10) made of a resilient material. The body has an inlet end (11) and an outlet end (12). The outlet end includes one or more slits (20) through the wall (19) of the body. The slit or slits (20) do not extend into that area (18) of the wall (19) of the body which forms the extremity (18) of the outlet end (12). A valve 26, 27) is located in the inlet end (11), said vale having a bore (30) with a pair of flaps (36) at the inner end of the bore, these flaps defining an outlet slot (38) through which liquid passing through one end of the bore can pass into the interior of the hollow body. The valve in its relaxed state is open to permit such flow to occur but the flaps are such as to close the outlet slot (38) upon any reverse flow of liquid from the interior of the hollow body occurring.

Abstract: A teat includes a hollow body made of a resilient material. The body has an inlet end and an outlet end. The outlet end includes at least one slit through the wall of the body. The slit(s) do not extend into that area of the wall of the body which forms the extremity of the outlet end. Engaged with the inlet end is a valve when, in use of the teat, the teat is full of liquid the valve prevents liquid from flowing back through the inlet end upon a squeezing action being applied to the teat.