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.