Duralex Made In France Lys Stackable Clear Bowl, 3.5-Inch, Set of 6 Duralex is 2.5 times more resistant to breakage and chipping than normal glass, can also withstand sudden thermal shock: from -4f to 266f Shock resistant tempered glass can go straight from the freezer to the microwave Duralex glass is very hygienic; it is non-porous and does not absorb liquids, colors or flavor Set includes 6, 3.5 Inch Stackable Bowls Freezer, microwave and dishwasher safe; Made in France