"Exclusive Patented Design Products: Elevate your drinking experience with Erichbows 32oz (1000ml) ribbed glass cups. Fluted design exudes vintage charm adding a touch of elegance to any occasion." Safe & Secure Material: Made of high borosilicate glass with excellent heat and cold resistance this mug is able to withstand both high and very extremely temperatures. Environmentally friendly non-toxic and odorless. The straw is also made of the same high quality glass for safety and reliability. High and Extremely Temperature Resistance: Compared with other ordinary glass cup not only the bottle has a uniform thickness and is comfortable to hold but its sturdy quality can easily withstand the temperature difference between -68°F~320°F. Easy to Clean: The glass cup design and materials guarantee easy cleaning and maintenance. Moreover you can conveniently put them in the dishwasher for a thorough clean saving you the hassle of hand washing. Wide Application: This ribbed glass cup is not only suitable for hoppy drinks lagers traditional cocktails traditional cocktails cold drinks sodas morning coffee iced water but can also be used as shakers in many bars to make colorful drinks.