This glass mug is made of high borosilicate glass material which is lead-free, cadmium-free, and safe to use. It has a double wall design to protect your hands from hot beverages, keeping your drink warm or cold for longer. Equipped with a splash-proof lid and a movable buckle, it is safe to use and easy to drink. It can be used in a microwave oven, oven, dishwasher, cabinets etc. Comfortable to hold with an elegant arc-shaped line, it can hold coffee, tea, lemonade, DIY simple fruit tea or whatever else you like. Features: 1. Comfortable to hold, the elegant arc-shaped line keeps you grasped the glass comfortably, can hold coffee, tea, lemonade, DIY simple fruit tea or whatever else you like. 2. Equipped with silicone sealing cover, splash-proof design, safe to use, when the cup cover and the movable buckle are closed, it can be splash-proof. When drinking, turn the movable button to the temporary position to expose the drinking spout. 3. The glass coffee mug has a double wall glass cup design that adds protection for your hands from your glass mug for hot beverages, keep your drink warm or cold for longer. 4. High borosilicate glass material, high temperature resistance, lead-free, cadmium-free, and safe non-toxic, you can rest assured use. 5. Wide range of applications, the cup can be used in microwave ovens, ovens, dishwashers, cabinets, etc. Specification: Material: Glass, Silicone Color: Pink, Yellow, Blue, Black Capacity: 350ml, 450ml Product Size: 9 x 9 x 13cm, 9 x 9 x 16cm Product Weight: 180g, 200g Package Included: 1 x Double Wall Glass Coffee Mug