No reason to get excited. Where Lufthansa puts a full-page insert into their wine list to offer a second champagne (and they only do for particular routes), they load one (!) bottle for the flight. Last year, those special champagnes included Dom Perignon and Taittinger Comtes des Champagne Rose. I had four flights in 2017 from SIN to FRA (as in one of the longest flights LH flies) and they confirmed that catering is one bottle.

The above situation is slighted where Heidsieck Blanc des millenaires is loaded as the standard champagne (and that's 3 bottles per long haul flight) and one bottle Roederer 2007 where duties are paid so they can open it on the ground.