This Glass Coffee Mugs is made of high-quality borosilicate glass, which has excellent thermal shock resistance and is dishwasher-safe. Its unique chemical composition ensures that the acidity of drinks and food is original and unaffected. The cup is cold-resistant and heat-resistant, and the hand-blown process gives it a fine texture. The light transmittance is as high as 92%, showing a clear visual enjoyment. The rounded cup mouth design is elegant, with an ergonomic handle, comfortable to hold and easy to clean, making it an ideal choice for daily life.