A simple refill container for holding a refill detergent, which is capable of being displayed plurally in a small space, carrying out the refilling of the content simply and reliably, and being discarded simply. The container consists of a thermoformed container body, and a seal film with which an opening at the lower end of the container body is sealed. A tapering cylindrical shoulder portion is joined to an upper edge of the trunk portion of the container body, and a nozzle tube (4) the upper end of which is closed with a top plate portion (21) extends upward from the central part of the shoulder portion. When a material is packed in the container body, and, when the refill containers are displayed after they have been refilled with a material, the shoulder portion is depressed into the interior of the trunk portion. In order to pack the content of a refill container into another refill container, the shoulder portion is projected outward from the trunk portion, and the free end portion of the nozzle tube is cut off to form an injection port.