Williams-Sonoma
Williams Sonoma Double Wall Glass Espresso Cups, Set of 4

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Details
Fun as well as functional, these double-walled espresso cups create a dramatic “floating liquid” effect when coffee is poured inside. Two walls of borosilicate glass produce an insulating layer that keeps freshly brewed espresso piping-hot while remaining cool to the touch outside. Superstrong yet lightweight, borosilicate glass is dishwasher safe and will not become cloudy over time. Microwavable. 3.5-oz. cap., 3 1/4" high. Made in China.