A hydration vest (1) having a vest plate (2) and a fluid container (3) removably attached thereto. The fluid container has a drinking tube (4) extending from a bottom of the fluid container (3) a sufficient length to reach over a wearer's shoulder into the mouth the wearer. The fluid container (3) encompasses a reservoir (10) having a centrally-located vertical bulkhead (12) extending from a top to proximate a bottom of the reservoir (10) in the fluid container (3). The hydration vest (1) is removably attachable around a torso of a person by a pair of shoulder straps (5) and a pair of waist straps (6).

A hydration vest (1) having a vest plate (2) and a fluid container (3) removably attached thereto. The fluid container has a drinking tube (4) extending from a bottom of the fluid container (3) a sufficient length to reach over a wearer's shoulder into the mouth the wearer. The fluid container (3) encompasses a reservoir (10) having a centrally-located vertical bulkhead (12) extending from a top to proximate a bottom of the reservoir (10) in the fluid container (3). The hydration vest (1) is removably attachable around a torso of a person by a pair of shoulder straps (5) and a pair of waist straps (6).

A collapsible, reusable drinking container is provided having a first opening suitable for pouring and filling, a second opening for accessing the interior of the container for cleaning, and a flexible straw for drinking the contents while the container is held in an upright position. The first opening is reversibly sealed with a cap, the second opening with an interlocking ridge and groove fastener, and the straw is reversibly sealed using a plug, a cap, a push-pull cap, a reversibly discontinuous portion of the straw, or an element for reversibly kinking the straw. The straw is attached to the container wall, to the cap for sealing the first opening, or to the fastener for sealing the second opening.

A collapsible, reusable drinking container is provided having a first opening suitable for pouring and filling, a second opening for accessing the interior of the container for cleaning, and a flexible straw for drinking the contents while the container is held in an upright position. The first opening is reversibly sealed with a cap, the second opening with an interlocking ridge and groove fastener, and the straw is reversibly sealed using a plug, a cap, a push-pull cap, a reversibly discontinuous portion of the straw, or an element for reversibly kinking the straw. The straw is attached to the container wall, to the cap for sealing the first opening, or to the fastener for sealing the second opening.

Bladders/containers designed to hold a meaningful amount of material (in any state: solid, liquid or gas) to conductively absorb heat from the human body. In addition, the material may be consumed by the user wearing the bladder/container, thus providing a source of hydration for the user. The bladders/containers would also enhance impact and/or ballistic protection of the user.

Bladders/containers designed to hold a meaningful amount of material (in any state: solid, liquid or gas) to conductively absorb heat from the human body. In addition, the material may be consumed by the user wearing the bladder/container, thus providing a source of hydration for the user. The bladders/containers would also enhance impact and/or ballistic protection of the user.

Filling devices disclosed herein comprise a container having an open end, a first tubular attachment in fluid communication with the interior of the container, a second tubular attachment in fluid communication with the interior of the container, and a removable and re-installable closure or cap for the open end of the container. Hydration systems disclosed herein comprise a hydration bladder, a first hose section, a filling device in accordance with the embodiments herein, a second hose section, and a mouthpiece. The first hose section connects the hydration bladder to the filling device, and the second hose section connects the filling device to the mouthpiece.

Filling devices disclosed herein comprise a container having an open end, a first tubular attachment in fluid communication with the interior of the container, a second tubular attachment in fluid communication with the interior of the container, and a removable and re-installable closure or cap for the open end of the container. Hydration systems disclosed herein comprise a hydration bladder, a first hose section, a filling device in accordance with the embodiments herein, a second hose section, and a mouthpiece. The first hose section connects the hydration bladder to the filling device, and the second hose section connects the filling device to the mouthpiece.

A flexible structure may be configured to expand a collapsible flask. The flexible structure may include a first loop made of an elastically flexible material and a second loop made of an elastically flexible material. The first loop and the second loop may be operatively coupled together at a first intersection and a second intersection. The first loop and the second loop, together, may be elastically movable between a compressed configuration in which the first loop and the second loop are sufficiently narrow to fit through an opening of the collapsible flask, and an expanded configuration in which the first loop and the second loop are not sufficiently narrow to fit through the opening.

A flexible structure may be configured to expand a collapsible flask. The flexible structure may include a first loop made of an elastically flexible material and a second loop made of an elastically flexible material. The first loop and the second loop may be operatively coupled together at a first intersection and a second intersection. The first loop and the second loop, together, may be elastically movable between a compressed configuration in which the first loop and the second loop are sufficiently narrow to fit through an opening of the collapsible flask, and an expanded configuration in which the first loop and the second loop are not sufficiently narrow to fit through the opening.