Fun as well as functional, these double-walled glass cups create a dramatic "floating liquid" effect when beverages are poured inside. Two walls of borosilicate glass produce an insulating layer that keeps hot drinks hot while remaining cool to the touch outside. These cups are ideal for serving warm beverages such as coffee, tea, hot chocolate and mulled cider; they also keep cold drinks cold. Superstrong yet lightweight, borosilicate glass is dishwasher safe and will not become cloudy over time. Microwavable. 10.7-oz. cap., 4 1/2" high. Made in China.