FIELD: liquid storage devices.
SUBSTANCE: plastic bag has base creating container bottom, neck and body section. Base includes inversion ring extending from vertical container wall and enclosing member urged upwards. In initial container position inversion ring defines S-shaped cross-section. A container is filled and sealed ring is dome-shaped. Inner part of inversion ring surface is inclined to support container surface at angle of 7°-15°. Thickness of body container part is at least 15% greater than that of the base. Central member to be urged upwards and inversion ring are movable and may compensate vacuum created inside container.
EFFECT: provision of stable container shape in the case of hot container filling or container sterilization.
13 cl, 6 dwg, 1 tbl
