A seal assembly includes a seal body having a space formed therein; a seal carrier held within the space, the seal carrier being selectively positionable between a sealing position and a rotation position by moving along a carrying path; at least one seal carried by the seal carrier; and a hermetic seal held within the space out of the carrying path of the seal carrier, the hermetic seal being configured to be abraded away by a rotating element that the hermetic seal is pressing against.

Systems, devices, and methods for beverage preparation. Embodiments of the present disclosure include a beverage system including: a fluid feeder configured to discharge a fluid; an ingredient feeder configured to discharge one or more ingredients; a mixing chamber having a dispensing opening, the mixing chamber configured to receive the fluid and the one or more ingredients; a mixer configured to mix the fluid and the one or more ingredients in the mixing chamber; a dispenser configured to control dispensing from the mixing chamber via the dispensing opening; and a controller or control circuit programmed to perform operations including: receiving from a user a selection for a beverage; and producing the beverage automatically.