Diamonds can be anyone's best friends as proven by these double-wall Tiffany ring mugs. Specially designed for sipping beverages, these posh mugs make your coffee bar instantly ostentatious. Take sips of coffee in these elegant coffee mugs that are built using the mouth-blown method, an ancient technology of inflating glass to manipulate it into decorative artworks. Adding more flavorful visual interest, these durable mugs are made of borosilicate glass. What makes these mugs different from regular mugs is the tiffany diamond ring attached as handles. Made with high-grade material, the insulated mugs keep hot beverages from getting cold. Plus, the mugs have no condensation formation on the outside.