A beta container for an alpha-beta port system includes a sheath for receiving transport material and a flange part having a through opening for transferring the transport material from and/or into the sheath, a first interface for a reversible connection to an alpha connection of the port system, and a second interface for releasable attachment of a beta cover for closing the through opening. An edge of the sheath is connected with a first surface of a ring which encompasses a jacket surface of the flange part, the first surface and the jacket surface having different materials. An elastic bellows may be fastened to the flange part such that, in the relaxed state, it engages over the second interface and/or projects out of the through-opening on the side facing away from the sheath, and such that it can be compressed. At least one transponder for transmitting an identification may be arranged on the flange part.