Highball glasses are designed for drinks with a higher ratio of mixer to spirit, like Gin & Tonics or Moscow Mules.
They typically hold 8 to 12 ounces (240 to 350 milliliters) of liquid and are taller than old-fashioned glasses but shorter and wider than Collins glasses.
Their shape helps maintain carbonation and allows ample room for ice and garnishes.
The glasses are made of lead-free glass or crystal, which helps preserve the drink's purity and chill.