Check this announcement out from Onboard Service:

Due to a significant price increase, we no longer will board Johnnie Walker Black Label Scotch. Caterers have been instructed to use Black Label until depletion, at which time we will board Chivas Regal Scotch. In United First in international markets, we also will begin offering Glenlivet Single Malt Scotch Whiskey as an added customer choice. The Spirits list in Hemispheres magazine will be updated as stock is depleted.