PERFECT WAY TO START THE DAY Classic and elegant glass mug features a double wall construction to keep your drinks at the ideal temperature. It is suitable for hot and cold beverages. Cookidea double-walled glasses Made of tasteless borosilicate glass are lightweight and robust at the same time. Under the glass base there is a hydrophobic silicone membrane, which serves the pressure balance between the glass walls. It allows the glass to 'breathe': with cold drinks, no condensation forms on the glass surface and the glass leaves no unsightly water wreaths. These glasses are also ideal for serving ice cream and other desserts. Features: Capacity: the capacity to the brim is 450 ml. We recommend you fill the cup with 350 ml of liquid comfortably. A perfect choice for coffee, tea, desserts and more. Notes: 1. Important: hand wash recommended. 2. Freezer safe. 3. Microwave-safe (max. 2 minutes. / 600 Watt) 4. There may be slight differences between items because each one is hand blown and handmade. 5. Due to the special production, there is an inevitable sealed hole at the bottom of each glass. Please do not use sharp objects on the hole.