A few opera houses, at least, have embraced the idea of opera-inspired tippling. The Met has several themed drinks on their menu; "Lulu's Disposable Lover" might be my new favorite cocktail name. Seattle Opera also commissioned a series of themed drink/food pairings, of which my favorite is the Carmen cocktail, with vodka, cointreau, and champagne. (The Attila sounds appropriately dangerous.) Beyond this, I have found several delights, but fewer than I expected.
Among the riches bestowed on the world by 1920s Paris is, apparently, this gin-based opera cocktail, which sounds remarkably decadent, and also like something I would drink. Fellow opera aficionado Bob Kingston contributed the idea of a Eugene Onegin: 1.5 oz cranberry vodka, 1.5 tsp Cointreau, 2 oz fresh blood orange juice, 2 lemon twists for garnish. Fill shaker with cracked ice. Add vodka, Cointreau, and juice. Pour into a sugar-rimmed martini glass. (I've made this with regular vodka and a mixture of cranberry and orange juice.)
Otherwise... we are left with renaming things. Make a Sazerac and call it Porgy & Bess; rechristen your Old Fashioneds after Papa Germont. If you're having brunch, serve Bellinis and Turn-of-the-Screwdrivers. Shakespeare-themed cocktails, like Othello's green-eyed monster, could always be served with the operas they inspired. But this feels a little like cheating, and also like ignoring the Verdian spin on the bard's plots.
So, Gentle Readers, here is where I entreat you: what opera-themed cocktails do you know, or might you devise? Have you ever bought a bottle of wine for its opera-related label? If so, what was the result? I recently bought this rosé because it was christened after the insouciant Manon, and was not disappointed.