A dispenser for substances includes an outer shell with a deformable outer wall which encloses the deformable container arrangement and also comprising at least one balancing valve for balancing air, wherein an air filled interspace is provided between the outer wall and the container arrangement and substances are dispensed once the outer shell has been subjected to pressure, and wherein the container arrangement has at least two containers for the separate storage of liquid for pasty substances. For long term storage of the substances in particular an outlet portion of the container arrangement has a diffusion seal made from metal which is pierced and opened by the dispensing head using points just before the dispenser is being used.

The present disclosure provides a device. In an embodiment, a device for dispensing a fluid under pressure is provided and includes: (A) a flexible container comprising four panels, each panel formed from a flexible multilayer film composed of one or more polymeric materials, the four panels forming (i) a body, and (ii) a neck; (B) a fitment comprising a top portion and a base, the base composed of a polymeric material, the base sealed in the neck; (C) a sleeve bag on valve assembly (SBoV) comprising (i) a valve housing, (ii) a core tube attached to the valve housing, (iii) a bag around the core tube, the bag attached to the valve housing, (iv) a sleeve surrounding the bag and the core tube, and (v) a valve seat; (D) the SBoV inserted through the fitment and located in the body; and (E) the valve seat attached to the fitment.

A container structure and a fluid transfer device including the same are disclosed. The container structure according to one aspect of the present disclosure may include a container body having an internal space formed therein and one end open; a stopper coupled to the container body so as to close the open end of the container body; and an elastic thin film dividing the internal space of the container body into a first space in which a fluid is stored and a second space separated from the first space.