A fluid container system comprises a bottle having bellows and being moveable from an extended position to dispense the fluid to a compressed position with a smaller internal volume than when in the extended position. The fluid container may also include a bladder housed within the bottle for storing the fluid; a valve demountably engageable to the bottle and the bladder, and the valve is capable of being closed to prevent the flow of the fluid and gas, or opened to dispense the fluid and gas. The fluid container may also comprise top and bottom endplates that support the bottle.

A closed-head drum and inliner for storing and transporting liquid or free-flowing filling materials is disclosed. In order to improve the use of liners in closed-head drums, and to facilitate the handling for the users such as the filling and emptying operators, so as to allow the closed-head drum with liner to be handled in the same or similar way as a closed-head drum without a liner, the disclosed technology can enable the liner to abut, attach to, adhere to, and/or to adhesively and/or detachably bonded to inner surfaces of the drum by virtue of a vacuum being created in the space between the inner surfaces of the drum and the outer surface of the liner.

A plastic beer keg includes an outer container and a liner having a neck portion and a body portion. A removable lid is secured over an opening of the container to enclose the liner. A locking ring secures the neck portion to the lid. The neck optionally includes a neck ring which interlocks with the opening through the lid to prevent relative rotation therebetween. The locking ring optionally includes ratcheting teeth engaging ratchet teeth on the lid to prevent inadvertent loosening of the locking ring. The liner may be suspended from the lid by the neck when empty.

The invention provides for a container that may include a liquid-holding vessel and a skeleton shell supporting the liquid holding vessel. The liquid-holding vessel may comprise a flexible polymer or plastic material for preventing contact between a liquid stored in or dispensed from the container and the skeleton. The liquid-holding vessel and the closure may be formed from a minimal amount of polymer or plastic. The invention also provides for a connection of a liquid-holding vessel with a fitment to the skeleton shell using ultrasonic means. Further, a skeleton shell with mating features allowing the skeleton shell to be formed with smooth edges is provided.

A pipe connectable plastic bucket includes a bucket and at least two quick-connect devices. The bucket has a plurality of through holes for communication between the inside and the outside of the bucket. The at least two quick-connect devices respectively correspond to the plurality of through holes, and are disposed on the bucket. The at least two quick-connect devices are adapted to connect to pipes, and are used for allowing a fluid entering and exiting the bucket through the plurality of the through holes. The at least two quick-connect devices comprise a first quick-connect device for allowing the liquid to enter and to exit the bucket. The present invention also provides a method of using the pipe connectable plastic bucket.