| CPC B01F 35/422 (2022.01) [B01F 23/2361 (2022.01); B01F 23/237621 (2022.01)] | 23 Claims |

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1. A carbonation machine comprising:
a receiving device for receiving a bottle, the receiving device has a fastening device for fastening the bottle, the fastening device comprises an iris device, the iris device has an opening, the opening of the iris device is configured to have a variable size,
wherein the receiving device is transferable from a bottle-receiving state, which is configured for receiving the bottle, into an attachment state, in which the bottle is attached to the receiving device,
wherein as the receiving device is transferred from the bottle-receiving state into the attachment state, a size of the opening of the iris device decreases,
wherein in the bottle-receiving state, the bottle is arranged in a non-vertical receiving position on the receiving device; and in the attachment state, the bottle is arranged in a preparation position, and as the receiving device is transferred from the bottle-receiving state into the attachment state, the bottle is tilted from the non-vertical receiving position into the preparation position,
wherein the iris device has an iris element, the iris element is configured to pivot, the iris element is arranged in a radially outer position in the bottle-receiving state, and as the receiving device is transferred from the bottle-receiving state into the attachment state, the iris element is pivoted from the radially outer position into a radially inner position about a pivot axis, the radially inner position is provided for fastening the bottle.
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