Duralex - Lys Square Stackable Bowl with White Lid 11-cm (4 1/8 in) Capacity 7 1/4 oz, Diameter 10.5 cm, Height 4.3 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 the original look for years. Made in France.