These products are made of glass materials, can use them with confidence. Very suitable for private gatherings of friends and family. These are suitable for drinking water, sake and spirits. They are made of glass and are safe to use. The design is beautiful and will add a unique flavor to any bar room. Features - ColorTransparent -Material:Glass - Size: 13.00X9.00X9.00cm/5.11X3.54X3.54in - They are suitable for homes, restaurants, tea houses, hotels and other places. The surface is smooth, without burrs, and will not hurt your hands. - The craftsmanship is superb, and cup edges are smooth and they feel comfortable. - They can also be used as for your family and friends. You can enjoy liquor with this set of liquor warmer. - Not only a practical beverage appliance, but also a luxury and decoration, suitable for a variety of occasions, such as , parties, wine parties and so on. - The product will be a good helper soon when you need to take advantage of them for a long time in one way. Package list: 1 x Set of Wine Warmer