It's called the II Palio, and it's the brainchild of Jeff Faile, the bar manager at Chef Fabio Trabocchi's new Washington, D.C. restaurant Casa Luca. The drink starts out as a classic Manhattan served on the rocks, but then pulls off a remarkable trick. Those rocks, it turns out, are a mixture of water and Campari. So, as the ice cubes melt, the drink transforms from a Manhattan to a Boulevardier—another classic drink that's basically a Negroni made with bourbon instead of gin. The cocktail is named after a popular horse race, which takes place twice a year in Sienna, Italy. But don't race to the finish with this one, as you'll miss its slow, steady—and dare I say classic—transformative powers.