Abstract: A container for pourable foodstuffs has a base, a side wall connected to the base and surrounding a storage chamber. An elastic cuff is connected with a first end to the side wall and has a second end with an opening. The cuff width decreases from first to second end along a longitudinal container axis. The elastic cuff can be pushed into and pulled out of the storage chamber. A sealing element shaped as a stopper can be inserted into the opening for closing the container and has a shank portion matched in shape and size to the opening such that sealing abutment of a shank portion surface against surfaces of the elastic cuff adjoining the cuff opening is established in a contact region of the shank portion when the stopper is inserted. The shank portion has an end with a thickened portion thicker than the contact region.