First of all, slow down, Maimi. Ease up Nakky! Don’t get too wasted, because you need to finish this photo shoot. Think about the last time you saw a Hello! Project idol drinking. Now, stop thinking about Kago Ai, and think about the H!P Kids. I can imagine Okai Chisato crushing a few Asahi Super Dry cans, so I guess the choice for Maimi and Nakky is plausibly champagne.
Actually, I can see Nakky being an favor of sweet “girly” drinks.