Made to accommodate drinks both hot and cold, the Duo Glass is a versatile addition to your home bar. It's designed to perfectly hold a two-inch ice ball — the mold for which is included in the package — and the glass itself has subtle 1 oz. indicators blown into the mold, making proper cocktail preparation a cinch. Hand-blown from borosilicate glass, the 10 oz vessel has a double-walled design that helps retain the temperature of your drink and eliminates condensation rings on your furniture. Available in single ($24), double ($48), or 4-packs ($78), all of which contain an ice mold for each glass included.