EXTRUSION CONTAINER

PURPOSE:To reduce the amount of residual content, in a container for extruding the content by utilizing the contraction of elastic rubber, by forming the container into a cylindrical bag shape and bonding a pleat-like projection body to said container in the inside axis direction thereof or internally filling the container with said projection body. CONSTITUTION:When the rubber cylindrical bag B closed at the lower end thereof within an outer container A is filled with a chemical solution from the mouth C thereof under pressure, the rubber bag B expands. By providing a stop valve to the mouth part to close the same, the chemical solution returns to a filled state and, when the valve is opened, the filled chemical solution is discharged under pressure. At this time, when the cylindrical bag B has a large hollow part as shown by a cross section S1, the chemical solution remains in the quantity corresponding to the hollow part. If the remaining of the chemical solution should be reduced, the hollow part may be minimized but,since there is a limit in the expansion or rubber, a filling amount becomes less. When a pleat-like projection body is mounted to the hollow part as shown by S2, the hollow part becomes small and the amount of the residual chemical solution can be reduced.