The cups are fired at a high temperature and can be filled with boiling water directly. The cups are made of reinforced new bone china, fine clay material, pure porcelain, and high-density cups. The glaze is made of minerals, feldspar, and other materials, no lead, no mercury, and other heavy metals. Frosted glaze, smooth inside the cup, very suitable for drinking water, coffee, and other beverages. Thick handle, elegant and beautiful, thoughtful design, comfortable hand feeling, drink anywhere, anytime. The bottom of each cup is smoothed to prevent scratching the table surface. Made from ceramic material, measuring 3.07*3.46 inches, this custom ceramic color mug with beaded handle 10oz. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization available: Print your logo or customize packaging and color schemes. Product Highlights: BPA-free, leak-proof, travel-friendly.