All Pyrex glass products have thermal shock resistance up to 220C. Can withstand temperatures of up to 300 C and down to -40 C. Oven, microwave, dishwasher and freezer friendly. Plastic lids are not heat resistant (may not be used in the microwave or oven). Airtight / Leakproof. Hygienic, removable seal for easy cleaning. Writing Zone on Lid (with a pencil). Stackable. Made from Borosilicate Glass. Made in France.