Duralex - Picardie Marine Tumbler 250 ml (8 3/4 oz) Set of 4 Set includes four blue tumblers. Capacity: 8 3/4 ounces, Diameter: 8.7 cm. Height: 9 cm. Duralex,shock resistant tempered glass, is 2.5 times more resistant to breakage and chipping than normal glass. Can also withstand sudden thermal shock from -4 F to 212 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 its original look for years. Made in France.