JS Gourmet's 8.5oz coffee mugs feature a double-walled design for enhanced insulation, ensuring that drinks stay hot or cold longer without transferring heat to the exterior. These high-quality glass espresso cups boast a transparent exterior, showcasing your beverages while maintaining a sleek, modern aesthetic. With a versatile 250ml capacity, these double wall cups are perfect for a variety of drinks, including tea, hot chocolate, espresso, cappuccino, and Irish coffee, making them ideal for entertaining friends and family. The ergonomically designed handle provides a comfortable and secure grip. A small round hole at the bottom of each mug allows for ventilation, preventing bursting during use. These mugs are also easy to clean, ensuring hassle-free upkeep. Additionally, double-walled glass coffee mugs make a thoughtful gift for any occasion, offering both practicality and style for your loved ones.