Set includes six 3-5/7-ounce glasses;The original french tumbler, made by the company that invented tempered glass;Duralex is 2-1/2 times more resistant to breakage and chipping than normal glass, can also withstand sudden thermal shock: from -4-degree F to 212-degree F;Duralex glass is very hygienic: it is non-porous and does not absorb liquids, colors or flavors;Dishwasher, refrigerator and microwave safe; Products maintain the original look for years