FYI my flight 09/08 BOS-MUC (changed from FRA last minute) had 3 bottles (at least) of the Alexandra loaded, the FA said that there was plenty!
Edit: the menu online only listed the Thienot, printed menu had both. PDB on offer when we boarded was Thienot but they were happy to open the Alexandra and anything else we wanted. We had excellent service on the flight.