Abstract: The invention relates to a container arrangement for fluids that contain gas, comprising a casing. Said casing is made of a pressure-proof collapsible material, and surrounds at least two chambers. The first chamber is used to receive and release the fluids containing gas via a first connection. The second chamber is a pressure chamber that is provided with a second connection for applying pressure. A flexible wall is arranged between the first chamber and the second chamber. The invention further relates to a method for transporting and releasing liquids containing gas into or from a pressure-proof collapsible casing, in addition to a corresponding pressure-proof, flexible non or slightly elastic covering. A container arrangement for liquids containing gas that has a simple construction, is easy to produce, fill, transport, empty and dispose of or recycle is provided due to the above mentioned invention.