An infant feeder has a handle with a proximally extending tongue and a pouch assembly for fitting over the tongue. The tongue has first and second axially spaced apart detenting structures. In a first configuration, a pouch assembly detenting structure is engaged with the first tongue detenting structure. In order to achieve a second configuration, a predetermined axial force is applied to the pouch assembly relative to the handle, so as to disengage the pouch assembly detenting structure from the first tongue detenting structure, slide the pouch assembly distally down a sidewall of the tongue and engage the second tongue detenting structure. This decreases the size of the food volume bounded by the pouch assembly and the tongue, and proximally displaces any food contained therein.

An infant feeder has a handle with a proximally extending tongue and a pouch assembly for fitting over the tongue. The tongue has first and second axially spaced apart detenting structures. In a first configuration, a pouch assembly detenting structure is engaged with the first tongue detenting structure. In order to achieve a second configuration, a predetermined axial force is applied to the pouch assembly relative to the handle, so as to disengage the pouch assembly detenting structure from the first tongue detenting structure, slide the pouch assembly distally down a sidewall of the tongue and engage the second tongue detenting structure. This decreases the size of the food volume bounded by the pouch assembly and the tongue, and proximally displaces any food contained therein.

A vessel includes an inner container, an outer container, a connector, a cap, and a lid. The outer container includes a first coupler and an outer chamber. The inner container includes a second coupler and an inner chamber to hold a liquid. The inner container is receivable at least partially within the outer chamber. The connector includes a third coupler that is complementary to the first coupler, and a fourth coupler that is complementary to the second coupler. When both the first coupler is engaged with the third coupler and the second coupler is engaged with the fourth coupler, the outer chamber is entirely enclosed within a liquid-proof barrier.

Methods and systems for handling and dispensing fluid are disclosed herein. In some embodiments, a method includes dispensing fluid into an inner chamber and inserting the inner container into an outer chamber of an outer container. The method can include dispensing a coolant into the outer chamber of the outer container and coupling an outer container coupler of the outer container to a first coupler of a connector such that the connector defines a gap between the inner container and the outer container. The method can include coupling a second coupler of the connector to a lid coupler of a lid, wherein the lid coupler has the same thread pitch as the inward-facing threads of the outer container coupler of the outer container. The method can include cooling the fluid to a chilled storage temperature and dispensing the fluid out of the inner chamber.