1. The insulated coffee mug is made from premium food-grade borosilicate material, 100% lead-free. Heat or Cold Resistant can suit the temperature from cold ( -20℃) to hot (130℃). 2 layer with a smooth and clear look, your drink will seem to float in mid-air, what's amazing!2. You can easily see how much of your drink has left through durable clear glass. Comfort-grip handle will help you to grasp your coffee mug in a warm and affectionate embrace, also makes it easy to drink from.3. Keep your fingers from burning with heat transfer resistant glassware, so beverages stay warm while you stay safe and cool4. You can fill in 201 to 300ml liquid in each mug, which is large enough to nicely go with espresso machines or coffee makers. Perfectly sized for use at the home, school, office, coffee house, or bar.5. The special design and premium quality make it the ideal gift for Christmas, Thanksgiving, housewarmings, birthdays, anniversary, Valentine's Day, Mother’s day, or other special days. etc