Duralex, a French manufacturer known for tempered glassware Made from tempered glass, making them highly resistant to impact, chipping, and thermal shock (can withstand temperatures from -4°F to 266°F) – significantly stronger than ordinary glass. Named after the Lys River, symbolizing clarity, simplicity, and utility. They feature a collar on the rim for convenient, space-saving stacking. Versatility & Care: These bowls are non-porous and hygienic, preventing absorption of liquids, colors, or flavors. They are safe for use in the microwave, freezer, and dishwasher. Usage: Ideal for everyday use in kitchens for food preparation (mise en place), mixing, serving, and storing both hot and cold liquids and foods.