This mug applies High Borosilicate Glass which has high hardness, high strength, low expansion rate, high-temperature resistance, the total weight is only 0.37 Ounce, that is the biggest difference from traditional glass which is heavy, thick and fragile. Volume is 15.4 Ounce(450 ml), unique design, this cup applies high quality unleaded thin glass, perfect options for daily use, parties and clubs. Suitable for parties, Valentine’s Day, Anniversary, Father’s Day, events, weddings, and Christmas, also can be a great gift for your friends and lover. Get one for yourself and one for friends, family or colleagues who appreciate a laugh or need a lift. Perfect fashionable mugs for beer, soda, water, and many other beverages, bring you the relax and happy time.