DOUBLE-WALLED DESIGNOur Coffee Mug is evolved with oval shape design,made with two layer baseAnd has an excellent thermal insulation effect, keeping your drink hot or cold for a longer period while the outer glass remains safe to touch; suspends drinks within an inner wall for an engaging visual effect! FOOD-GRADE BOROSILICATE GLASSMade from sturdy borosilicate glass,light but strong. accept the temperature from -30 to 150, It is more durable than ordinary glass,It is recommended to wash your hands. All glassware is fragile, so please use and clean it carefully. MULTIPLE USES The double walled glass mugs set is suitable for cafes, restaurants, bars and your own home for daily meals, work, meetings and parties.Suitable for coffees like latte, espresso, cappuccino, macchiato, or any beverages like juice, tea, or coke. PERFECT GIFT4x80ml Double-walled glasses. Suitable for most people's eating habits, not too small or too big. A few cups a day can make you full of energy! With the perfect appearance and size, they can become coffee lovers, tea enthusiasts, family warming parties, Christmas, anniversary, movement, birthday, Father's Day, Mother's Day gift!