US Patent 10370166 Fluid substance container

A fluid substance container including a collar featuring a passage and a pair of laminated film sheets heat-welded along perimetral welding lines so as to form a bag, the pair of sheets also being heat-welded to the collar so that the passage in the collar provides access to interior of the bag; the collar features a cup-shaped part in which the passage is formed, there being a sealing lip extending from a bottom of the cup-shaped part, the sealing lip being formed integrally with the collar and intended to cooperate in an air-tight manner with an outer surface of the body of a hermetic pump which may be housed, at least partially, in the collar.