Glassware Products: At Pyrex, we love to cook in every kitchen around the world. All Pyrex glass products are made in France of high quality borosilicate glass. Pyrex glass products have a 10 year guarantee. All Pyrex glass products have thermal shock resistance up to 220C. These products can withstand temperatures of up to 300 C and down to -40 C. Oven , microwave, dishwasher and freezer friendly.All plastic lids are not heat resistant and may not go in the microwave or oven.