Features: High borosilicate glass material: double-layer design thickened heat-resistant and burst-resistant. Practical: It has strong mechanical strength and strong performance for rapid cooling and high-temperature changes. Wide range of uses: suitable for coffee or other beverages; perfect for home party bar and any other occasions; great for personal use. Smooth bottom : The bottom is polished and smooth not easy to scratch the coffee table. Unlimited Drinking: The crystal clear beauty allows you to experience unrestricted drinking and can withstand temperatures from -20 to 150°C. Specification: Material: high borosilicate glass Size: 80ml: 9*5.5cm\3.54x2.16in 200ml: 11&7cm\4.33x2.75in Notice: Due to different lighting and screen settings the item color may be slightly different from the picture. Due to different manual measurements please allow a 1-2cm difference in size. packing list: 1*Double Wall Glass Coffee Mugs