9" glass straws (standard diameter of 9.5mm) with a lifetime guarantee! These straws are made of shatter-resistant borosilicate, the hardest glass commercially available. Use with hot or cold drinks, then rinse with hot water or pop them in the dishwasher. (They're microwave, oven, and freezer-safe, too). We chose bent straws so they won't roll away from you! Various colors available, as well as a gift set of 4 clear straws with fiesta dots.