Durability meets beauty with the Good Citizen 12 oz Double Walled Glass Mug. These premium borosilicate glass mugs keep your coffee and tea warm with a double-walled installation that stays cool to the touch. Save your tabletops from rings with these double-walled glass mug that won't "sweat" while you cool off with a cold drink. Coming in a variety of colors, you can mix and match to create a set of coffee mugs that perfectly fit your style.