This Double glass tumbler outlines a romantic star-like visual beauty with elegant and smooth lines. It is made of high-quality borosilicate glass, which is healthy, environmentally friendly, safe and durable. The double-layer design not only effectively keeps warm, but also prevents burns and improves comfort. The 35° rounded cup mouth fits the lip curve, making it smooth and natural when drinking. Every detail has been carefully polished, specially designed for you who understand life, making every toast an enjoyment, adding a sense of refinement and ritual to daily life.