Crafted from tempered glass for exceptional resistance to extreme changes in temperature. Duralex Glass is virtually unbreakable and 100% non-porous, remaining Free from staining & contaminants across its lifespan. Upgrade your kitchen food storage game with the very best combination of strength, usability and durability, the Lys range of Round Stacking Glass Food Serving Bowls from French glassware specialists Duralex ticks all the boxes. Proven to be more than twice the strength of regular annealed equivalents. Duralex glass is also BPA-free and completely non-porous, eliminating the risk of the glass tainting your food and food staining the glass. The durability of these bowls is matched perfectly by their practicality - 100% safe for use in the Dishwasher, Freezer and even the Microwave. A thermal shock rating of 130 degree allows you to swap immediately between the three with confidence and it is perfect for defrosting / reheating and flash freezing alike. Available in size: 23cm.