Drink Ginger Ale or even beer. IME, it tastes better than the sparkling wine served in FC. The AA domestic F sparkling used to be Dom St Michelle, around $8. I am not sure what it is these days. I give them credit for still offering it, but it is best used to clean gum off your shoe. Better yet, you could shlep a bottle of Vueve with you and ask the FA to serve it to you.

You won't see Krug and/or DP on any US carrier even in INTL FC these days.