13 oz. Almost Unbreakable Glass Mug (4 pc.)

4 PAK: "Almost Unbreakable" Clear 13 ounce Glass Coffee Mug - These 13 oz. mugs are manufactured by Libbey and treated by Santanoni's exclusive HercuGlass process. The HercuGlass process strengthens glassware the same way Fighter Aircraft windshields, iPHONE glass covers and EpiPen bee sting antidote cartridges are strengthened. Depending on the glass design and thickness, our glassware can withstand bangs, drops on the floor, etc. They are not unbreakable however, they are the strongest glass products you can buy that will withstand abuse that might cause similar glassware to fracture.