Pour the sparkling wine, vodka, ginger beer, and melon balls into a large glass pitcher. The glass pitcher is solely for aesthetics — you can see the bright, colorful melon. Cover the pitcher tightly, and refrigerate — overnight is best but even just a few hours in the refrigerator is better than nothing.

Right before serving the sangria, add ice, fresh mint leaves, and lime wheels to the pitcher.

This sangria does not keep, not because it won't taste good the next few days, but you will probably drink half of it by yourself before you even serve it, and then what.