Abstract: A carbonation machine includes a rotatable carbonation head including at least one pressure release valve, a carbonation tube connectable via piping to a gas canister and a flange for engaging a neck of a bottle filled with liquid to be carbonated by screwing the neck into or onto the flange to firmly hold the bottle with the carbonation tube maintained inside the bottle, and for disengaging the neck of the bottle from the flange by unscrewing the neck off the flange. The rotatable carbonation head is configured, when screwing the neck into or onto the flange, to be rotated from a release position to a lock position, and is configured, when unscrewing the neck off the flange, to be rotated from the lock position to the release position. In the release position said at least one pressure release valve is operated to open so as to release excess pressure if such excess pressure exists in the bottle, and in the lock position said at least one pressure valve remains closed.