More upper-end bars are serving modern cocktails and classics in the coupe, a stemmed glass with vintage style. Basically a champagne saucer, the coupe is an elegant vessel that comes from a time before the martini glass was called a martini glass. Not as slosh-prone as its v-shaped counterpart, they are sized appropriately for classic recipes. Yet, sometimes the classic martini glass is exactly what's called for. Unique cocktails deserve unique glasses. Fortunately, there are several styles from which to choose.