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.

An improved baby bottle having an exterior shell (or sleeve) housing a flexible bladder. The improved baby bottle comprises a collar and a hood affixable over the collar. In some embodiments, the hood comprises one or more laterally-protruding tabs. In other embodiments, the exterior shell defines an open bottom end and/or is metered. The nipple of the bottle comprises a slit shaped to form cusps which pull away from the nipple when sucked.

A feeding bottle includes a bottle enclosure defining a hollow bottle chamber, wherein the enclosure defines a feeding outlet at a first end and an attachment structure 26 at a second end. A bottom housing defines an instrument compartment extending between a closed exterior portion of the bottom housing and a separation surface within the bottom housing, wherein the bottom housing is configured for detachable connection to the attachment structure 26 of the bottle enclosure. A relief valve is positioned within the separation surface of the bottom housing. A pressure sensor is positioned adjacent the separation surface of the bottom housing and connected by a passageway to the instrument compartment in the bottom housing, wherein the pressure sensor is configured to detect changes of pressure in the bottle enclosure.

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.