Abstract: A contraction-controlled bellows container (1) is disclosed, which can retain half or fully contracted configurations of the bellows ridges (2) whose upper walls (21) and/or lower walls (22) have at least one circumferential indentation (3) adjacent the corresponding outer hinges (23) and/or inner hinges (24). The indentations utilize the pressure applied onto the container effectively and get depressed further into the corresponding bellows ridges prior to the corresponding portions of the other walls, reducing the total pressure requirement. The indentations bring together the walls in which the indentations are provided into the bellows ridges (2). These walls are gradually turned in shape to lose their shape restoration thanks to their generally protruding configuration. Adjustment of the sizes of the indentations makes it possible to selectively contract the bellows ridges.

Abstract: A contractible plastic bellows container is disclosed, which can be made in a single molding process and is capable of discharging practically all the viscous fluid content. A plastic bellows container of the invention comprises a neck portion with an opening, a top shoulder section, a bottom shoulder section, and a bottom protrusion. The bottom shoulder section and the bottom protrusion are reversible. When the plastic bellows container is fully contracted, the space created therein by the overlapping bellows can be substantially eliminated by the reversed bottom protrusion entering inside of the neck portion and the reversed bottom shoulder section. The bellows container may advantageously be used with an airtight discharging means.