Elegant 2-Piece Set European style coffee cups/mugs double layer wall made from High Borosilicate Glass. This 6.7oz coffee mugs are perfect match for your espresso/latte/cappuccino machine. Enjoy every sip of your favorite drink with our smooth and polish finish to protect your lips. This double wall glass coffee mugs make a perfect gift for any coffee lover. - Modern Design Clear Glass Coffee Mugs Set - Double-Walled Hand Blown To Protect The Hands - Square Handle - Manual Design, Manual Welding - High Borosilicate Glass - Hot & Cold - Extra Lightweight - Only 4.2 ounces - 2 Coffee/Espresso Cups/Mugs Set

Double-walled coffee mugs are a type of insulated drinking vessel designed to keep your beverage at the desired temperature for a longer period of time. They are typically made of high-quality borosilicate glass, which is known for its durability, heat resistance, and ability to resist thermal shock.