A sub -assembly and liquid processing system for saving and empty liquid, the sub -assembly is including the container that is used for storing and empting liquid, the container has the mouth that is centered on by the border, and separate part for the storage ware of the liquid that formation was waited to be handled, but and the suspension so that support by the container in the container, and this separate part is used for hold liquid processing apparatus for the liquid that stores up the ware export is flow through in the processing, wherein separate part includes upper portion portion section and follows the portion of the dangling section that upper portion portion section was dangled, wherein separate part presses and can be from the primary importance pivot to the second place towards the container through the first son with upper portion portion section portion section, wherein only under the second place in the primary importance and the second place, separate part permits liquid to pour out from the container on one side of container, and the first son portion section of container one side and upper portion portion section relatively, the portion's section of wherein dangling is sealed up along the portion's of dangling section peripheral at least most medial surface that leans on the container lateral wall that supports under the primary importance including seal part, this seal part.